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<?xml version="1.0" encoding="iso-8859-1"?>
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<html><head><title>QString Class Reference</title><style>h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm }
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</style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr /><td align="left" valign="top" width="32"><img align="left" border="0" height="32" src="images/rb-logo.png" width="32" /></td><td width="1">  </td><td class="postheader" valign="center"><a href="../pyqt4ref.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a></td></table><h1 align="center">QString Class Reference<br /><sup><sup>[<a href="qtcore.html">QtCore</a> module]</sup></sup></h1><p>The QString class provides a Unicode character string. <a href="#details">More...</a></p>
<h3>Types</h3><ul><li><div class="fn" />enum <b><a href="qstring.html#NormalizationForm-enum">NormalizationForm</a></b> { NormalizationForm_D, NormalizationForm_C, NormalizationForm_KD, NormalizationForm_KC }</li><li><div class="fn" />enum <b><a href="qstring.html#SectionFlag-enum">SectionFlag</a></b> { SectionDefault, SectionSkipEmpty, SectionIncludeLeadingSep, SectionIncludeTrailingSep, SectionCaseInsensitiveSeps }</li><li><div class="fn" />class <b><a href="qstring-sectionflags.html">SectionFlags</a></b></li><li><div class="fn" />enum <b><a href="qstring.html#SplitBehavior-enum">SplitBehavior</a></b> { KeepEmptyParts, SkipEmptyParts }</li></ul><h3>Methods</h3><ul><li><div class="fn" /><b><a href="qstring.html#QString">__init__</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qstring.html#QString">__init__</a></b> (<i>self</i>, QKeySequence)</li><li><div class="fn" /><b><a href="qstring.html#QString-2">__init__</a></b> (<i>self</i>, QChar <i>c</i>)</li><li><div class="fn" /><b><a href="qstring.html#QString-3">__init__</a></b> (<i>self</i>, int <i>size</i>, QChar <i>c</i>)</li><li><div class="fn" /><b><a href="qstring.html#QString-4">__init__</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" /><b><a href="qstring.html#QString-5">__init__</a></b> (<i>self</i>, QLatin1String <i>latin1</i>)</li><li><div class="fn" /><b><a href="qstring.html#QString-6">__init__</a></b> (<i>self</i>, QByteArray <i>a</i>)</li><li><div class="fn" /><b><a href="qstring.html#QString-7">__init__</a></b> (<i>self</i>, QUuid)</li><li><div class="fn" />QString <b><a href="qstring.html#append">append</a></b> (<i>self</i>, QChar <i>c</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#append-2">append</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#append-3">append</a></b> (<i>self</i>, QLatin1String <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#append-4">append</a></b> (<i>self</i>, QByteArray <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#arg">arg</a></b> (<i>self</i>, int <i>a</i>, int <i>fieldWidth</i> = 0, int <i>base</i> = 10, QChar <i>fillChar</i> = QLatin1Char(32))</li><li><div class="fn" />QString <b><a href="qstring.html#arg-2">arg</a></b> (<i>self</i>, float <i>a</i>, int <i>fieldWidth</i> = 0, char <i>fmt</i> = 'g', int <i>prec</i> = -1, QChar <i>fillChar</i> = QLatin1Char(32))</li><li><div class="fn" />QString <b><a href="qstring.html#arg-3">arg</a></b> (<i>self</i>, long <i>a</i>, int <i>fieldwidth</i> = 0, int <i>base</i> = 10, QChar <i>fillChar</i> = QLatin1Char(32))</li><li><div class="fn" />QString <b><a href="qstring.html#arg-4">arg</a></b> (<i>self</i>, unsigned long <i>a</i>, int <i>fieldwidth</i> = 0, int <i>base</i> = 10, QChar <i>fillChar</i> = QLatin1Char(32))</li><li><div class="fn" />QString <b><a href="qstring.html#arg-5">arg</a></b> (<i>self</i>, QChar <i>a</i>, int <i>fieldWidth</i> = 0, QChar <i>fillChar</i> = QLatin1Char(32))</li><li><div class="fn" />QString <b><a href="qstring.html#arg-6">arg</a></b> (<i>self</i>, QString <i>a</i>, int <i>fieldWidth</i> = 0, QChar <i>fillChar</i> = QLatin1Char(32))</li><li><div class="fn" />QString <b><a href="qstring.html#arg-7">arg</a></b> (<i>self</i>, QString <i>a1</i>, QString <i>a2</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#arg-8">arg</a></b> (<i>self</i>, QString <i>a1</i>, QString <i>a2</i>, QString <i>a3</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#arg-9">arg</a></b> (<i>self</i>, QString <i>a1</i>, QString <i>a2</i>, QString <i>a3</i>, QString <i>a4</i>)</li><li><div class="fn" />QChar <b><a href="qstring.html#at">at</a></b> (<i>self</i>, int <i>i</i>)</li><li><div class="fn" />int <b><a href="qstring.html#capacity">capacity</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qstring.html#chop">chop</a></b> (<i>self</i>, int <i>n</i>)</li><li><div class="fn" /><b><a href="qstring.html#clear">clear</a></b> (<i>self</i>)</li><li><div class="fn" />int <b><a href="qstring.html#compare">compare</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#contains">contains</a></b> (<i>self</i>, QString <i>s</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />bool <b><a href="qstring.html#contains-2">contains</a></b> (<i>self</i>, QChar <i>c</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />bool <b><a href="qstring.html#contains-3">contains</a></b> (<i>self</i>, QRegExp <i>rx</i>)</li><li><div class="fn" />int <b><a href="qstring.html#count">count</a></b> (<i>self</i>)</li><li><div class="fn" />int <b><a href="qstring.html#count-2">count</a></b> (<i>self</i>, QChar <i>c</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />int <b><a href="qstring.html#count-3">count</a></b> (<i>self</i>, QString <i>s</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />int <b><a href="qstring.html#count-4">count</a></b> (<i>self</i>, QRegExp)</li><li><div class="fn" />bool <b><a href="qstring.html#endsWith">endsWith</a></b> (<i>self</i>, QString <i>s</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />bool <b><a href="qstring.html#endsWith-2">endsWith</a></b> (<i>self</i>, QLatin1String <i>s</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />bool <b><a href="qstring.html#endsWith-3">endsWith</a></b> (<i>self</i>, QChar <i>c</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />QString <b><a href="qstring.html#fill">fill</a></b> (<i>self</i>, QChar <i>c</i>, int <i>size</i> = -1)</li><li><div class="fn" />int <b><a href="qstring.html#indexOf">indexOf</a></b> (<i>self</i>, QChar <i>c</i>, int <i>from</i> = 0, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />int <b><a href="qstring.html#indexOf-2">indexOf</a></b> (<i>self</i>, QString <i>s</i>, int <i>from</i> = 0, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />int <b><a href="qstring.html#indexOf-3">indexOf</a></b> (<i>self</i>, QRegExp, int <i>from</i> = 0)</li><li><div class="fn" />QString <b><a href="qstring.html#insert">insert</a></b> (<i>self</i>, int <i>i</i>, QChar <i>c</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#insert-2">insert</a></b> (<i>self</i>, int <i>i</i>, QChar <i>uc</i>, int <i>len</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#insert-3">insert</a></b> (<i>self</i>, int <i>i</i>, QString <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#insert-4">insert</a></b> (<i>self</i>, int <i>i</i>, QLatin1String <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#isEmpty">isEmpty</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#isNull">isNull</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#isRightToLeft">isRightToLeft</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#isSimpleText">isSimpleText</a></b> (<i>self</i>)</li><li><div class="fn" />int <b><a href="qstring.html#lastIndexOf">lastIndexOf</a></b> (<i>self</i>, QChar <i>c</i>, int <i>from</i> = -1, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />int <b><a href="qstring.html#lastIndexOf-2">lastIndexOf</a></b> (<i>self</i>, QString <i>s</i>, int <i>from</i> = -1, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />int <b><a href="qstring.html#lastIndexOf-3">lastIndexOf</a></b> (<i>self</i>, QRegExp, int <i>from</i> = -1)</li><li><div class="fn" />QString <b><a href="qstring.html#left">left</a></b> (<i>self</i>, int <i>len</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#leftJustified">leftJustified</a></b> (<i>self</i>, int <i>width</i>, QChar <i>fill</i> = QLatin1Char(32), bool <i>trunc</i> = False)</li><li><div class="fn" />int <b><a href="qstring.html#length">length</a></b> (<i>self</i>)</li><li><div class="fn" />int <b><a href="qstring.html#localeAwareCompare">localeAwareCompare</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#mid">mid</a></b> (<i>self</i>, int <i>i</i>, int <i>len</i> = -1)</li><li><div class="fn" />QString <b><a href="qstring.html#normalized">normalized</a></b> (<i>self</i>, NormalizationForm <i>mode</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#normalized-2">normalized</a></b> (<i>self</i>, NormalizationForm <i>mode</i>, QChar.UnicodeVersion <i>version</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#prepend">prepend</a></b> (<i>self</i>, QChar <i>c</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#prepend-2">prepend</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#prepend-3">prepend</a></b> (<i>self</i>, QLatin1String <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#prepend-4">prepend</a></b> (<i>self</i>, QByteArray <i>s</i>)</li><li><div class="fn" /><b><a href="qstring.html#push_back">push_back</a></b> (<i>self</i>, QChar <i>c</i>)</li><li><div class="fn" /><b><a href="qstring.html#push_back-2">push_back</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" /><b><a href="qstring.html#push_front">push_front</a></b> (<i>self</i>, QChar <i>c</i>)</li><li><div class="fn" /><b><a href="qstring.html#push_front-2">push_front</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#remove">remove</a></b> (<i>self</i>, int <i>i</i>, int <i>len</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#remove-2">remove</a></b> (<i>self</i>, QChar <i>c</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />QString <b><a href="qstring.html#remove-3">remove</a></b> (<i>self</i>, QString <i>s</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />QString <b><a href="qstring.html#remove-4">remove</a></b> (<i>self</i>, QRegExp <i>rx</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#replace">replace</a></b> (<i>self</i>, int <i>i</i>, int <i>len</i>, QChar <i>after</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#replace-2">replace</a></b> (<i>self</i>, int <i>i</i>, int <i>len</i>, QChar <i>s</i>, int <i>slen</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#replace-3">replace</a></b> (<i>self</i>, int <i>i</i>, int <i>len</i>, QString <i>after</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#replace-4">replace</a></b> (<i>self</i>, QChar <i>before</i>, QChar <i>after</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />QString <b><a href="qstring.html#replace-5">replace</a></b> (<i>self</i>, QChar <i>c</i>, QString <i>after</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />QString <b><a href="qstring.html#replace-6">replace</a></b> (<i>self</i>, QString <i>before</i>, QString <i>after</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />QString <b><a href="qstring.html#replace-7">replace</a></b> (<i>self</i>, QRegExp <i>rx</i>, QString <i>after</i>)</li><li><div class="fn" /><b><a href="qstring.html#reserve">reserve</a></b> (<i>self</i>, int <i>asize</i>)</li><li><div class="fn" /><b><a href="qstring.html#resize">resize</a></b> (<i>self</i>, int <i>size</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#right">right</a></b> (<i>self</i>, int <i>len</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#rightJustified">rightJustified</a></b> (<i>self</i>, int <i>width</i>, QChar <i>fill</i> = QLatin1Char(32), bool <i>trunc</i> = False)</li><li><div class="fn" />QString <b><a href="qstring.html#section">section</a></b> (<i>self</i>, QString <i>in_sep</i>, int <i>start</i>, int <i>end</i> = -1, SectionFlags <i>flags</i> = QString.SectionDefault)</li><li><div class="fn" />QString <b><a href="qstring.html#section-2">section</a></b> (<i>self</i>, QRegExp <i>reg</i>, int <i>start</i>, int <i>end</i> = -1, SectionFlags <i>flags</i> = QString.SectionDefault)</li><li><div class="fn" />QString <b><a href="qstring.html#section-3">section</a></b> (<i>self</i>, QChar <i>asep</i>, int <i>astart</i>, int <i>aend</i> = -1, SectionFlags <i>aflags</i> = QString.SectionDefault)</li><li><div class="fn" />QString <b><a href="qstring.html#setNum">setNum</a></b> (<i>self</i>, int <i>n</i>, int <i>base</i> = 10)</li><li><div class="fn" />QString <b><a href="qstring.html#setNum-2">setNum</a></b> (<i>self</i>, float, char <i>f</i> = 'g', int <i>prec</i> = 6)</li><li><div class="fn" />QString <b><a href="qstring.html#setNum-3">setNum</a></b> (<i>self</i>, long, int <i>base</i> = 10)</li><li><div class="fn" />QString <b><a href="qstring.html#setNum-4">setNum</a></b> (<i>self</i>, unsigned long, int <i>base</i> = 10)</li><li><div class="fn" />QString <b><a href="qstring.html#simplified">simplified</a></b> (<i>self</i>)</li><li><div class="fn" />int <b><a href="qstring.html#size">size</a></b> (<i>self</i>)</li><li><div class="fn" />QStringList <b><a href="qstring.html#split">split</a></b> (<i>self</i>, QString <i>sep</i>, SplitBehavior <i>behavior</i> = QString.KeepEmptyParts, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />QStringList <b><a href="qstring.html#split-2">split</a></b> (<i>self</i>, QChar <i>sep</i>, SplitBehavior <i>behavior</i> = QString.KeepEmptyParts, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />QStringList <b><a href="qstring.html#split-3">split</a></b> (<i>self</i>, QRegExp <i>sep</i>, SplitBehavior <i>behavior</i> = QString.KeepEmptyParts)</li><li><div class="fn" /><b><a href="qstring.html#squeeze">squeeze</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#startsWith">startsWith</a></b> (<i>self</i>, QString <i>s</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />bool <b><a href="qstring.html#startsWith-2">startsWith</a></b> (<i>self</i>, QLatin1String <i>s</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />bool <b><a href="qstring.html#startsWith-3">startsWith</a></b> (<i>self</i>, QChar <i>c</i>, Qt.CaseSensitivity <i>cs</i> = Qt.CaseSensitive)</li><li><div class="fn" />QByteArray <b><a href="qstring.html#toAscii">toAscii</a></b> (<i>self</i>)</li><li><div class="fn" />(float, bool <i>ok</i>) <b><a href="qstring.html#toDouble">toDouble</a></b> (<i>self</i>)</li><li><div class="fn" />(float, bool <i>ok</i>) <b><a href="qstring.html#toFloat">toFloat</a></b> (<i>self</i>)</li><li><div class="fn" />(int, bool <i>ok</i>) <b><a href="qstring.html#toInt">toInt</a></b> (<i>self</i>, int <i>base</i> = 10)</li><li><div class="fn" />QByteArray <b><a href="qstring.html#toLatin1">toLatin1</a></b> (<i>self</i>)</li><li><div class="fn" />QByteArray <b><a href="qstring.html#toLocal8Bit">toLocal8Bit</a></b> (<i>self</i>)</li><li><div class="fn" />(long, bool <i>ok</i>) <b><a href="qstring.html#toLong">toLong</a></b> (<i>self</i>, int <i>base</i> = 10)</li><li><div class="fn" />(long, bool <i>ok</i>) <b><a href="qstring.html#toLongLong">toLongLong</a></b> (<i>self</i>, int <i>base</i> = 10)</li><li><div class="fn" />QString <b><a href="qstring.html#toLower">toLower</a></b> (<i>self</i>)</li><li><div class="fn" />(int, bool <i>ok</i>) <b><a href="qstring.html#toShort">toShort</a></b> (<i>self</i>, int <i>base</i> = 10)</li><li><div class="fn" />(unsigned long, bool <i>ok</i>) <b><a href="qstring.html#toUInt">toUInt</a></b> (<i>self</i>, int <i>base</i> = 10)</li><li><div class="fn" />(unsigned long, bool <i>ok</i>) <b><a href="qstring.html#toULong">toULong</a></b> (<i>self</i>, int <i>base</i> = 10)</li><li><div class="fn" />(unsigned long, bool <i>ok</i>) <b><a href="qstring.html#toULongLong">toULongLong</a></b> (<i>self</i>, int <i>base</i> = 10)</li><li><div class="fn" />QString <b><a href="qstring.html#toUpper">toUpper</a></b> (<i>self</i>)</li><li><div class="fn" />(unsigned long, bool <i>ok</i>) <b><a href="qstring.html#toUShort">toUShort</a></b> (<i>self</i>, int <i>base</i> = 10)</li><li><div class="fn" />QByteArray <b><a href="qstring.html#toUtf8">toUtf8</a></b> (<i>self</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#trimmed">trimmed</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qstring.html#truncate">truncate</a></b> (<i>self</i>, int <i>pos</i>)</li></ul><h3>Static Methods</h3><ul><li><div class="fn" />int <b><a href="qstring.html#compare-2">compare</a></b> (QString <i>s1</i>, QString <i>s2</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#fromAscii">fromAscii</a></b> (str, int <i>size</i> = -1)</li><li><div class="fn" />QString <b><a href="qstring.html#fromLatin1">fromLatin1</a></b> (str, int <i>size</i> = -1)</li><li><div class="fn" />QString <b><a href="qstring.html#fromLocal8Bit">fromLocal8Bit</a></b> (str, int <i>size</i> = -1)</li><li><div class="fn" />QString <b><a href="qstring.html#fromUtf8">fromUtf8</a></b> (str, int <i>size</i> = -1)</li><li><div class="fn" />int <b><a href="qstring.html#localeAwareCompare-2">localeAwareCompare</a></b> (QString <i>s1</i>, QString <i>s2</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#number">number</a></b> (int, int <i>base</i> = 10)</li><li><div class="fn" />QString <b><a href="qstring.html#number-2">number</a></b> (float, char <i>f</i> = 'g', int <i>prec</i> = 6)</li><li><div class="fn" />QString <b><a href="qstring.html#number-3">number</a></b> (long, int <i>base</i> = 10)</li><li><div class="fn" />QString <b><a href="qstring.html#number-4">number</a></b> (unsigned long, int <i>base</i> = 10)</li></ul><h3>Special Methods</h3><ul><li><div class="fn" />QString <b><a href="qstring.html#__add__">__add__</a></b> (<i>self</i>, QByteArray <i>ba</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#__add__-2">__add__</a></b> (<i>self</i>, QChar <i>s2</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#__add__-3">__add__</a></b> (<i>self</i>, QString <i>s2</i>)</li><li><div class="fn" />int <b><a href="qstring.html#__contains__">__contains__</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__eq__">__eq__</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__eq__-2">__eq__</a></b> (<i>self</i>, QLatin1String <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__eq__-3">__eq__</a></b> (<i>self</i>, QByteArray <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__ge__">__ge__</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__ge__-2">__ge__</a></b> (<i>self</i>, QLatin1String <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__ge__-3">__ge__</a></b> (<i>self</i>, QByteArray <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#__getitem__">__getitem__</a></b> (<i>self</i>, int <i>i</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#__getitem__-2">__getitem__</a></b> (<i>self</i>, slice <i>slice</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__gt__">__gt__</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__gt__-2">__gt__</a></b> (<i>self</i>, QLatin1String <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__gt__-3">__gt__</a></b> (<i>self</i>, QByteArray <i>s</i>)</li><li><div class="fn" />long <b><a href="qstring.html#__hash__">__hash__</a></b> (<i>self</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#__iadd__">__iadd__</a></b> (<i>self</i>, QChar <i>c</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#__iadd__-2">__iadd__</a></b> (<i>self</i>, QChar.SpecialCharacter <i>c</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#__iadd__-3">__iadd__</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#__iadd__-4">__iadd__</a></b> (<i>self</i>, QLatin1String <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#__iadd__-5">__iadd__</a></b> (<i>self</i>, QByteArray <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#__imul__">__imul__</a></b> (<i>self</i>, int <i>m</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__le__">__le__</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__le__-2">__le__</a></b> (<i>self</i>, QLatin1String <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__le__-3">__le__</a></b> (<i>self</i>, QByteArray <i>s</i>)</li><li><div class="fn" />int <b><a href="qstring.html#__len__">__len__</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__lt__">__lt__</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__lt__-2">__lt__</a></b> (<i>self</i>, QLatin1String <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__lt__-3">__lt__</a></b> (<i>self</i>, QByteArray <i>s</i>)</li><li><div class="fn" />QString <b><a href="qstring.html#__mul__">__mul__</a></b> (<i>self</i>, int <i>m</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__ne__">__ne__</a></b> (<i>self</i>, QString <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__ne__-2">__ne__</a></b> (<i>self</i>, QLatin1String <i>s</i>)</li><li><div class="fn" />bool <b><a href="qstring.html#__ne__-3">__ne__</a></b> (<i>self</i>, QByteArray <i>s</i>)</li><li><div class="fn" />object <b><a href="qstring.html#__str__">__str__</a></b> (<i>self</i>)</li><li><div class="fn" />object <b><a href="qstring.html#__unicode__">__unicode__</a></b> (<i>self</i>)</li></ul><a name="details" /><hr /><h2>Detailed Description</h2><p>A Python string or unicode object
may be used whenever a
<a href="qstring.html">QString</a>
is expected.</p>
<p>The QString class provides a Unicode character string.</p>
<p>QString stores a string of 16-bit <a href="qchar.html">QChar</a>s, where each <a href="qchar.html">QChar</a> stores one Unicode 4.0 character. <a href="unicode.html">Unicode</a> is an international standard that supports most of the writing systems in use today. It is a superset of ASCII and Latin-1 (ISO 8859-1), and all the ASCII/Latin-1 characters are available at the same code positions.</p>
<p>Behind the scenes, QString uses <a href="shclass.html#implicit-sharing">implicit sharing</a> (copy-on-write) to reduce memory usage and to avoid the needless copying of data. This also helps reduce the inherent overhead of storing 16-bit characters instead of 8-bit characters.</p>
<p>In addition to QString, Qt also provides the <a href="qbytearray.html">QByteArray</a> class to store raw bytes and traditional 8-bit '\0'-terminated strings. For most purposes, QString is the class you want to use. It is used throughout the Qt API, and the Unicode support ensures that your applications will be easy to translate if you want to expand your application's market at some point. The two main cases where <a href="qbytearray.html">QByteArray</a> is appropriate are when you need to store raw binary data, and when memory conservation is critical (e.g. with Qtopia Core).</p>
<p>One way to initialize a QString is simply to pass a <tt>const char *</tt> to its constructor. For example, the following code creates a QString of size 5 containing the data "Hello":</p>
<pre>
QString str = "Hello";
</pre>
<p>QString converts the <tt>const char *</tt> data into Unicode using <a href="qstring.html#fromAscii">fromAscii</a>(). By default, <a href="qstring.html#fromAscii">fromAscii</a>() treats character above 128 as Latin-1 characters, but this can be changed by calling <a href="qtextcodec.html#setCodecForCStrings">QTextCodec.setCodecForCStrings</a>().</p>
<p>In all of the QString methods that take <tt>const char *</tt> parameters, the <tt>const char *</tt> is interpreted as a classic C-style '\0'-terminated string. It is legal for the <tt>const char *</tt> parameter to be 0.</p>
<p>You can also provide string data as an array of <a href="qchar.html">QChar</a>s:</p>
<pre>
static const QChar data[4] = { 0x0055, 0x006e, 0x10e3, 0x03a3 };
QString str(data, 4);
</pre>
<p>QString makes a deep copy of the <a href="qchar.html">QChar</a> data, so you can modify it later without experiencing side effects. (If for performance reasons you don't want to take a deep copy of the character data, use <a href="qstring.html#fromRawData">QString.fromRawData</a>() instead.)</p>
<p>Another approach is to set the size of the string using <a href="qstring.html#resize">resize</a>() and to initialize the data character per character. QString uses 0-based indexes, just like C++ arrays. To access the character at a particular index position, you can use operator[](). On non-const strings, operator[]() returns a reference to a character that can be used on the left side of an assignment. For example:</p>
<pre>
QString str;
str.resize(4);
str[0] = QChar('U');
str[1] = QChar('n');
str[2] = QChar(0x10e3);
str[3] = QChar(0x03a3);
</pre>
<p>For read-only access, an alternative syntax is to use <a href="qstring.html#at">at</a>():</p>
<pre>
for (int i = 0; i < str.size(); ++i) {
if (str.at(i) >= QChar('a') && str.at(i) <= QChar('f'))
qDebug() << "Found character in range [a-f]";
}
</pre>
<p><a href="qstring.html#at">at</a>() can be faster than operator[](), because it never causes a <a href="shclass.html#deep-copy">deep copy</a> to occur.</p>
<p>To extract several characters at a time, use <a href="qstring.html#left">left</a>(), <a href="qstring.html#right">right</a>(), or <a href="qstring.html#mid">mid</a>().</p>
<p>A QString can embed '\0' characters (<a href="qchar.html#SpecialCharacter-enum">QChar.null</a>). The <a href="qstring.html#size">size</a>() function always returns the size of the whole string, including embedded '\0' characters.</p>
<p>After a call to <a href="qstring.html#resize">resize</a>(), newly allocated characters have undefined values. To set all the characters in the string to a particular value, call <a href="qstring.html#fill">fill</a>().</p>
<p>QString provides dozens of overloads designed to simplify string usage. For example, if you want to compare a QString with a string literal, you can write code like this and it will work as expected:</p>
<pre>
if (str == "auto" || str == "extern"
|| str == "static" || str == "register") {
...
}
</pre>
<p>You can also pass string literals to functions that take QStrings and the QString(const char *) constructor will be invoked. Similarily, you can pass a QString to a function that takes a <tt>const char *</tt> using the <a href="qtcore.html#qPrintable">qPrintable</a>() macro which returns the given QString as a <tt>const char *</tt>. This is equivalent to calling <QString>.<a href="qstring.html#toAscii">toAscii</a>().<a href="qstring.html#constData">constData</a>().</p>
<p>QString provides the following basic functions for modifying the character data: <a href="qstring.html#append">append</a>(), <a href="qstring.html#prepend">prepend</a>(), <a href="qstring.html#insert">insert</a>(), <a href="qstring.html#replace">replace</a>(), and <a href="qstring.html#remove">remove</a>(). For example:</p>
<pre>
QString str = "and";
str.prepend("rock "); // str == "rock and"
str.append(" roll"); // str == "rock and roll"
str.replace(5, 3, "&"); // str == "rock & roll"
</pre>
<p>The <a href="qstring.html#replace">replace</a>() and <a href="qstring.html#remove">remove</a>() functions' first two arguments are the position from which to start erasing and the number of characters that should be erased.</p>
<p>A frequent requirement is to remove whitespace characters from a string ('\n', '\t', ' ', etc.). If you want to remove whitespace from both ends of a QString, use <a href="qstring.html#trimmed">trimmed</a>(). If you want to remove whitespace from both ends and replace multiple consecutive whitespaces with a single space character within the string, use <a href="qstring.html#simplified">simplified</a>().</p>
<p>If you want to find all occurrences of a particular character or substring in a QString, use <a href="qstring.html#indexOf">indexOf</a>() or <a href="qstring.html#lastIndexOf">lastIndexOf</a>(). The former searches forward starting from a given index position, the latter searches backward. Both return the index position of the character or substring if they find it; otherwise, they return -1. For example, here's a typical loop that finds all occurrences of a particular substring:</p>
<pre>
QString str = "We must be <b>bold</b>, very <b>bold</b>";
int j = 0;
while ((j = str.indexOf("<b>", j)) != -1) {
qDebug() << "Found <b> tag at index position" << j;
++j;
}
</pre>
<p>If you want to see if a QString starts or ends with a particular substring use <a href="qstring.html#startsWith">startsWith</a>() or <a href="qstring.html#endsWith">endsWith</a>(). If you simply want to check whether a QString contains a particular character or substring, use <a href="qstring.html#contains">contains</a>(). If you want to find out how many times a particular character or substring occurs in the string, use <a href="qstring.html#count">count</a>().</p>
<p>QString provides many functions for converting numbers into strings and strings into numbers. See the <a href="qstring.html#arg">arg</a>() functions, the <a href="qstring.html#setNum">setNum</a>() functions, the <a href="qstring.html#number">number</a>() static functions, and the <a href="qstring.html#toInt">toInt</a>(), <a href="qstring.html#toDouble">toDouble</a>(), and similar functions.</p>
<p>To get an upper- or lowercase version of a string use <a href="qstring.html#toUpper">toUpper</a>() or <a href="qstring.html#toLower">toLower</a>().</p>
<p>If you want to replace all occurrences of a particular substring with another, use one of the two-parameter <a href="qstring.html#replace">replace</a>() overloads.</p>
<p>QStrings can be compared using overloaded operators such as operator<(), operator<=(), operator==(), operator>=(), and so on. The comparison is based exclusively on the numeric Unicode values of the characters and is very fast, but is not what a human would expect. <a href="qstring.html#localeAwareCompare">QString.localeAwareCompare</a>() is a better choice for sorting user-interface strings.</p>
<p>Lists of strings are handled by the <a href="qstringlist.html">QStringList</a> class. You can split a string into a list of strings using <a href="qstring.html#split">split</a>(), and join a list of strings into a single string with an optional separator using <a href="qstringlist.html#join">QStringList.join</a>(). You can obtain a list of strings from a string list that contain a particular substring or that match a particular <a href="qregexp.html">QRegExp</a> using <a href="qlist-qt3.html#find">QStringList.find</a>().</p>
<p>If you are building a QString gradually and know in advance approximately how many characters the QString will contain, you can call <a href="qstring.html#reserve">reserve</a>(), asking QString to preallocate a certain amount of memory. You can also call <a href="qstring.html#capacity">capacity</a>() to find out how much memory QString actually allocated.</p>
<p>To obtain a pointer to the actual character data, call <a href="qstring.html#data">data</a>() or <a href="qstring.html#constData">constData</a>(). These functions return a pointer to the beginning of the <a href="qchar.html">QChar</a> data. The pointer is guaranteed to remain valid until a non-const function is called on the QString.</p>
<a id="conversions-between-8-bit-strings-and-unicode-strings" name="conversions-between-8-bit-strings-and-unicode-strings" />
<h3>Conversions between 8-bit strings and Unicode strings</h3>
<p>QString provides the following four functions that return a <tt>const char *</tt> version of the string as <a href="qbytearray.html">QByteArray</a>: <a href="qstring.html#toAscii">toAscii</a>(), <a href="qstring.html#toLatin1">toLatin1</a>(), <a href="qstring.html#toUtf8">toUtf8</a>(), and <a href="qstring.html#toLocal8Bit">toLocal8Bit</a>().</p>
<ul>
<li><a href="qstring.html#toAscii">toAscii</a>() returns an ASCII encoded 8-bit string.</li>
<li><a href="qstring.html#toLatin1">toLatin1</a>() returns a Latin-1 (ISO 8859-1) encoded 8-bit string.</li>
<li><a href="qstring.html#toUtf8">toUtf8</a>() returns a UTF-8 encoded 8-bit string. UTF-8 is a superset of ASCII that supports the entire Unicode character set through multibyte sequences.</li>
<li><a href="qstring.html#toLocal8Bit">toLocal8Bit</a>() returns an 8-bit string using the system's local encoding.</li>
</ul>
<p>To convert from one of these encodings, QString provides <a href="qstring.html#fromAscii">fromAscii</a>(), <a href="qstring.html#fromLatin1">fromLatin1</a>(), <a href="qstring.html#fromUtf8">fromUtf8</a>(), and <a href="qstring.html#fromLocal8Bit">fromLocal8Bit</a>(). Other encodings are supported through <a href="qtextcodec.html">QTextCodec</a>.</p>
<p>As mentioned above, QString provides a lot of functions and operators that make it easy to interoperate with <tt>const char *</tt> strings. This functionaly is a double-edged sword: It makes QString more convenient to use if all strings are ASCII or Latin-1, but there is always the risk that an implicit conversion from or to <tt>const char *</tt> is done using the wrong 8-bit encoding. To minimize these risks, you can turn off these implicit conversions by defining these two preprocessor symbols:</p>
<ul>
<li><tt>QT_NO_CAST_FROM_ASCII</tt> disables automatic conversions from ASCII to Unicode.</li>
<li><tt>QT_NO_CAST_TO_ASCII</tt> disables automatic conversion from QString to ASCII.</li>
</ul>
<p>One way to define these prepocessor symbols globally for your application is to add the following entry to your <a href="qmake-project-files.html">qmake project file</a>:</p>
<pre>
DEFINES += QT_NO_CAST_FROM_ASCII \
QT_NO_CAST_TO_ASCII
</pre>
<p>You then need to explicitly call <a href="qstring.html#fromAscii">fromAscii</a>(), <a href="qstring.html#fromLatin1">fromLatin1</a>(), <a href="qstring.html#fromUtf8">fromUtf8</a>(), or <a href="qstring.html#fromLocal8Bit">fromLocal8Bit</a>() to construct a QString from an 8-bit string, or use the lightweight <a href="qlatin1string.html">QLatin1String</a> class, for example:</p>
<pre>
QString url = QLatin1String("http://www.unicode.org/");
</pre>
<p>Similarly, you must call <a href="qstring.html#toAscii">toAscii</a>(), <a href="qstring.html#toLatin1">toLatin1</a>(), <a href="qstring.html#toUtf8">toUtf8</a>(), or <a href="qstring.html#toLocal8Bit">toLocal8Bit</a>() explicitly to convert the QString to an 8-bit string. (Other encodings are supported through <a href="qtextcodec.html">QTextCodec</a>.)</p>
<a id="note-for-c-programmers" name="note-for-c-programmers" />
<h3>Note for C programmers</h3>
<p>Due to C++'s type system and the fact that QString is <a href="shclass.html#implicitly-shared">implicitly shared</a>, QStrings may be treated like <tt>int</tt>s or other basic types. For example:</p>
<pre>
QString boolToString(bool b)
{
QString result;
if (b)
result = "True";
else
result = "False";
return result;
}
</pre>
<p>The variable, result, is a normal variable allocated on the stack. When return is called, because we're returning by value, The copy constructor is called and a copy of the string is returned. (No actual copying takes place thanks to the implicit sharing.)</p>
<a id="distinction-between-null-and-empty-strings" name="distinction-between-null-and-empty-strings" />
<h3>Distinction between null and empty strings</h3>
<p>For historical reasons, QString distinguishes between a null string and an empty string. A <i>null</i> string is a string that is initialized using QString's default constructor or by passing (const char *)0 to the constructor. An <i>empty</i> string is any string with size 0. A null string is always empty, but an empty string isn't necessarily null:</p>
<pre>
QString().isNull(); // returns true
QString().isEmpty(); // returns true
QString("").isNull(); // returns false
QString("").isEmpty(); // returns true
QString("abc").isNull(); // returns false
QString("abc").isEmpty(); // returns false
</pre>
<p>All functions except <a href="qstring.html#isNull">isNull</a>() treat null strings the same as empty strings. For example, <a href="qstring.html#toAscii">toAscii</a>().<a href="qstring.html#constData">constData</a>() returns a pointer to a '\0' character for a null string (<i>not</i> a null pointer), and <a href="qstring.html#QString">QString</a>() compares equal to QString(""). We recommend that you always use <a href="qstring.html#isEmpty">isEmpty</a>() and avoid <a href="qstring.html#isNull">isNull</a>().</p>
<p>See also <a href="qstring.html#fromRawData">fromRawData</a>(), <a href="qchar.html">QChar</a>, <a href="qlatin1string.html">QLatin1String</a>, and <a href="qbytearray.html">QByteArray</a>.</p>
<hr /><h2>Type Documentation</h2><h3 class="fn"><a name="NormalizationForm-enum" />QString.NormalizationForm</h3><table border="1" cellpadding="2" cellspacing="1" width="100%">
<tr>
<th width="25%">Constant</th>
<th width="15%">Value</th>
<th width="60%">Description</th>
</tr>
<tr>
<td valign="top"><tt>QString.NormalizationForm_D</tt></td>
<td align="center" valign="top"><tt>0</tt></td>
<td valign="top">Canonical Decomposition</td>
</tr>
<tr>
<td valign="top"><tt>QString.NormalizationForm_C</tt></td>
<td align="center" valign="top"><tt>1</tt></td>
<td valign="top">Canonical Decomposition followed by Canonical Composition</td>
</tr>
<tr>
<td valign="top"><tt>QString.NormalizationForm_KD</tt></td>
<td align="center" valign="top"><tt>2</tt></td>
<td valign="top">Compatibility Decomposition</td>
</tr>
<tr>
<td valign="top"><tt>QString.NormalizationForm_KC</tt></td>
<td align="center" valign="top"><tt>3</tt></td>
<td valign="top">Compatibility Decomposition followed by Canonical Composition</td>
</tr>
</table>
<br />
<br />
<p>See also <a href="qstring.html#normalized">normalized</a>() and <a href="http://www.unicode.org/reports/tr15/">Unicode Standard Annex #15</a>.</p>
<h3 class="fn"><a name="SectionFlag-enum" />QString.SectionFlag</h3><table border="1" cellpadding="2" cellspacing="1" width="100%">
<tr>
<th width="25%">Constant</th>
<th width="15%">Value</th>
<th width="60%">Description</th>
</tr>
<tr>
<td valign="top"><tt>QString.SectionDefault</tt></td>
<td align="center" valign="top"><tt>0x00</tt></td>
<td valign="top">Empty fields are counted, leading and trailing separators are not included, and the separator is compared case sensitively.</td>
</tr>
<tr>
<td valign="top"><tt>QString.SectionSkipEmpty</tt></td>
<td align="center" valign="top"><tt>0x01</tt></td>
<td valign="top">Treat empty fields as if they don't exist, i.e. they are not considered as far as <i>start</i> and <i>end</i> are concerned.</td>
</tr>
<tr>
<td valign="top"><tt>QString.SectionIncludeLeadingSep</tt></td>
<td align="center" valign="top"><tt>0x02</tt></td>
<td valign="top">Include the leading separator (if any) in the result string.</td>
</tr>
<tr>
<td valign="top"><tt>QString.SectionIncludeTrailingSep</tt></td>
<td align="center" valign="top"><tt>0x04</tt></td>
<td valign="top">Include the trailing separator (if any) in the result string.</td>
</tr>
<tr>
<td valign="top"><tt>QString.SectionCaseInsensitiveSeps</tt></td>
<td align="center" valign="top"><tt>0x08</tt></td>
<td valign="top">Compare the separator case-insensitively.</td>
</tr>
</table>
<br />
<br />
<p>The SectionFlags type is a typedef for <a href="qflags.html">QFlags</a><SectionFlag>. It stores an OR combination of SectionFlag values.</p>
<p>See also <a href="qstring.html#section">section</a>().</p>
<h3 class="fn"><a name="SplitBehavior-enum" />QString.SplitBehavior</h3><p>This enum specifies how <a href="qstring.html#split">split</a>() should behave with respect to empty strings.</p>
<table border="1" cellpadding="2" cellspacing="1" width="100%">
<tr>
<th width="25%">Constant</th>
<th width="15%">Value</th>
<th width="60%">Description</th>
</tr>
<tr>
<td valign="top"><tt>QString.KeepEmptyParts</tt></td>
<td align="center" valign="top"><tt>0</tt></td>
<td valign="top">If a field is empty, keep it in the result.</td>
</tr>
<tr>
<td valign="top"><tt>QString.SkipEmptyParts</tt></td>
<td align="center" valign="top"><tt>1</tt></td>
<td valign="top">If a field is empty, don't include it in the result.</td>
</tr>
</table>
<br />
<br />
<p>See also <a href="qstring.html#split">split</a>().</p>
<hr /><h2>Method Documentation</h2><h3 class="fn"><a name="QString" />QString.__init__ (<i>self</i>)</h3><p>Constructs a null string. Null strings are also empty.</p>
<p>See also <a href="qstring.html#isEmpty">isEmpty</a>().</p>
<h3 class="fn"><a name="QString" />QString.__init__ (<i>self</i>, <a href="qkeysequence.html">QKeySequence</a>)</h3><p>This method is only available if the QtGui module is imported.</p><p>Constructs a null string. Null strings are also empty.</p>
<p>See also <a href="qstring.html#isEmpty">isEmpty</a>().</p>
<h3 class="fn"><a name="QString-2" />QString.__init__ (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>)</h3><p>Constructs a string initialized with the first <i>size</i> characters of the <a href="qchar.html">QChar</a> array <i>unicode</i>.</p>
<p><a href="qstring.html">QString</a> makes a deep copy of the string data.</p>
<h3 class="fn"><a name="QString-3" />QString.__init__ (<i>self</i>, int <i>size</i>, <a href="qchar.html">QChar</a> <i>c</i>)</h3><p>Constructs a string of size 1 containing the character <i>ch</i>.</p>
<h3 class="fn"><a name="QString-4" />QString.__init__ (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><p>Constructs a string of size <i>size</i> with every character set to <i>ch</i>.</p>
<p>See also <a href="qstring.html#fill">fill</a>().</p>
<h3 class="fn"><a name="QString-5" />QString.__init__ (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>latin1</i>)</h3><p>Constructs a copy of the Latin-1 string <i>str</i>.</p>
<p>See also <a href="qstring.html#fromLatin1">fromLatin1</a>().</p>
<h3 class="fn"><a name="QString-6" />QString.__init__ (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>a</i>)</h3><p>Constructs a copy of <i>other</i>.</p>
<p>This operation takes <a href="containers.html#constant-time">constant time</a>, because <a href="qstring.html">QString</a> is <a href="shclass.html#implicitly-shared">implicitly shared</a>. This makes returning a <a href="qstring.html">QString</a> from a function very fast. If a shared instance is modified, it will be copied (copy-on-write), and that takes <a href="containers.html#linear-time">linear time</a>.</p>
<p>See also <a href="qstring.html#operator-eq">operator=</a>().</p>
<h3 class="fn"><a name="QString-7" />QString.__init__ (<i>self</i>, <a href="quuid.html">QUuid</a>)</h3><p>Constructs a string initialized with the ASCII string <i>str</i>. <i>str</i> is converted to Unicode using <a href="qstring.html#fromAscii">fromAscii</a>().</p>
<p>You can disable this constructor by defining <tt>QT_NO_CAST_FROM_ASCII</tt> when you compile your applications. This can be useful if you want to ensure that all user-visible strings go through <a href="qobject.html#tr">QObject.tr</a>(), for example.</p>
<p>See also <a href="qstring.html#fromAscii">fromAscii</a>(), <a href="qstring.html#fromLatin1">fromLatin1</a>(), <a href="qstring.html#fromLocal8Bit">fromLocal8Bit</a>(), and <a href="qstring.html#fromUtf8">fromUtf8</a>().</p>
<h3 class="fn"><a name="append" /><a href="qstring.html">QString</a> QString.append (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>)</h3><p>Appends the string <i>str</i> onto the end of this string.</p>
<p>Example:</p>
<pre>
QString x = "free";
QString y = "dom";
x.append(y);
// x == "freedom"
</pre>
<p>This is the same as insert(<a href="qstring.html#size">size</a>(), <i>str</i>).</p>
<p>This operation is typically very fast (<a href="containers.html#constant-time">constant time</a>), because <a href="qstring.html">QString</a> preallocates extra space at the end of the string data so it can grow without reallocating the entire string each time.</p>
<p>See also <a href="qstring.html#operator-2b-eq">operator+=</a>(), <a href="qstring.html#prepend">prepend</a>(), and <a href="qstring.html#insert">insert</a>().</p>
<h3 class="fn"><a name="append-2" /><a href="qstring.html">QString</a> QString.append (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Appends the Latin-1 string <i>str</i> to this string.</p>
<h3 class="fn"><a name="append-3" /><a href="qstring.html">QString</a> QString.append (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Appends the byte array <i>ba</i> to this string. <i>ba</i> is converted to Unicode using <a href="qstring.html#fromAscii">fromAscii</a>().</p>
<p>You can disable this function by defining <tt>QT_NO_CAST_FROM_ASCII</tt> when you compile your applications. This can be useful if you want to ensure that all user-visible strings go through <a href="qobject.html#tr">QObject.tr</a>(), for example.</p>
<h3 class="fn"><a name="append-4" /><a href="qstring.html">QString</a> QString.append (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>s</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Appends the string <i>str</i> to this string. <i>str</i> is converted to Unicode using <a href="qstring.html#fromAscii">fromAscii</a>().</p>
<p>You can disable this function by defining <tt>QT_NO_CAST_FROM_ASCII</tt> when you compile your applications. This can be useful if you want to ensure that all user-visible strings go through <a href="qobject.html#tr">QObject.tr</a>(), for example.</p>
<h3 class="fn"><a name="arg" /><a href="qstring.html">QString</a> QString.arg (<i>self</i>, int <i>a</i>, int <i>fieldWidth</i> = 0, int <i>base</i> = 10, <a href="qchar.html">QChar</a> <i>fillChar</i> = QLatin1Char(32))</h3><p>This function returns a copy of this string where <i>a</i> replaces the lowest numbered occurrence of <tt>%1</tt>, <tt>%2</tt>, ..., <tt>%99</tt>.</p>
<p>The <i>fieldWidth</i> value specifies the minimum amount of space that <i>a</i> is padded to and filled with the character <i>fillChar</i>. A positive value will produce right-aligned text, whereas a negative value will produce left-aligned text.</p>
<p>The following example shows how we could create a 'status' string when processing a list of files:</p>
<pre>
QString status = QString("Processing file %1 of %2: %3")
.arg(i) // current file's number
.arg(total) // number of files to process
.arg(fileName); // current file's name
</pre>
<p>It is generally fine to use file names and numbers as we have done in the example above. But note that using arg() to construct natural language sentences does not usually translate well into other languages because sentence structure and word order often differ between languages.</p>
<p>If there is no place marker (<tt>%1</tt>, <tt>%2</tt>, etc.), a warning message is output and the result is undefined. Note that only placeholders between <tt>%1</tt> and <tt>%99</tt> are supported.</p>
<h3 class="fn"><a name="arg-2" /><a href="qstring.html">QString</a> QString.arg (<i>self</i>, float <i>a</i>, int <i>fieldWidth</i> = 0, char <i>fmt</i> = 'g', int <i>prec</i> = -1, <a href="qchar.html">QChar</a> <i>fillChar</i> = QLatin1Char(32))</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>This is the same as str.arg(<i>a1</i>).arg(<i>a2</i>), except that the strings are replaced in one pass. This can make a difference if <i>a1</i> contains e.g. <tt>%1</tt>:</p>
<pre>
QString str = "%1 %2";
str.arg("%1f", "Hello"); // returns "%1f Hello"
str.arg("%1f").arg("Hello"); // returns "Hellof"
</pre>
<h3 class="fn"><a name="arg-3" /><a href="qstring.html">QString</a> QString.arg (<i>self</i>, long <i>a</i>, int <i>fieldwidth</i> = 0, int <i>base</i> = 10, <a href="qchar.html">QChar</a> <i>fillChar</i> = QLatin1Char(32))</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>This is the same as calling str.arg(<i>a1</i>).arg(<i>a2</i>).arg(<i>a3</i>), except that the strings are replaced in one pass.</p>
<h3 class="fn"><a name="arg-4" /><a href="qstring.html">QString</a> QString.arg (<i>self</i>, unsigned long <i>a</i>, int <i>fieldwidth</i> = 0, int <i>base</i> = 10, <a href="qchar.html">QChar</a> <i>fillChar</i> = QLatin1Char(32))</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>This is the same as calling str.arg(<i>a1</i>).arg(<i>a2</i>).arg(<i>a3</i>).arg(<i>a4</i>), except that the strings are replaced in one pass.</p>
<h3 class="fn"><a name="arg-5" /><a href="qstring.html">QString</a> QString.arg (<i>self</i>, <a href="qchar.html">QChar</a> <i>a</i>, int <i>fieldWidth</i> = 0, <a href="qchar.html">QChar</a> <i>fillChar</i> = QLatin1Char(32))</h3><p>This is an overloaded member function, provided for convenience.</p>
<p><i>a</i> is expressed in base <i>base</i>, which is 10 by default and must be between 2 and 36.</p>
<p>The <i>fieldWidth</i> value specifies the minimum amount of space that <i>a</i> is padded to and filled with the character <i>fillChar</i>. A positive value will produce a right-aligned number, whereas a negative value will produce a left-aligned number.</p>
<p>The '%' can be followed by an 'L', in which case the sequence is replaced with a localized representation of <i>a</i>. The conversion uses the default locale, set by QLocale.setDefaultLocale(). If no default locale was specified, the "C" locale is used. The 'L' flag is ignored if <i>base</i> is not 10.</p>
<pre>
QString str;
str = QString("Decimal 63 is %1 in hexadecimal")
.arg(63, 0, 16);
// str == "Decimal 63 is 3f in hexadecimal"
QLocale.setDefaultLocale(QLocale.English, QLocale.UnitedStates);
str = QString("%1 %L2 %L3")
.arg(12345)
.arg(12345)
.arg(12345, 0, 16);
// str == "12345 12,345 3039"
</pre>
<h3 class="fn"><a name="arg-6" /><a href="qstring.html">QString</a> QString.arg (<i>self</i>, <a href="qstring.html">QString</a> <i>a</i>, int <i>fieldWidth</i> = 0, <a href="qchar.html">QChar</a> <i>fillChar</i> = QLatin1Char(32))</h3><p>This is an overloaded member function, provided for convenience.</p>
<p><i>base</i> is the base to use when converting the integer <i>a</i> into a string. <i>base</i> must be between 2 and 36, with 8 giving octal, 10 decimal, and 16 hexadecimal numbers.</p>
<h3 class="fn"><a name="arg-7" /><a href="qstring.html">QString</a> QString.arg (<i>self</i>, <a href="qstring.html">QString</a> <i>a1</i>, <a href="qstring.html">QString</a> <i>a2</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>The <i>fieldWidth</i> value specifies the minimum amount of space that <i>a</i> is padded to and filled with the character <i>fillChar</i>. A positive value will produce a right-aligned number, whereas a negative value will produce a left-aligned number.</p>
<p><i>a</i> is expressed in base <i>base</i>, which is 10 by default and must be between 2 and 36.</p>
<p>The '%' can be followed by an 'L', in which case the sequence is replaced with a localized representation of <i>a</i>. The conversion uses the default locale. The default locale is determined from the system's locale settings at application startup. It can be changed using <a href="qlocale.html#setDefault">QLocale.setDefault</a>(). The 'L' flag is ignored if <i>base</i> is not 10.</p>
<pre>
QString str;
str = QString( "Decimal 63 is %1 in hexadecimal" )
.arg( 63, 0, 16 );
// str == "Decimal 63 is 3f in hexadecimal"
QLocale.setDefault(QLocale.English, QLocale.UnitedStates);
str = QString( "%1 %L2 %L3" )
.arg( 12345 )
.arg( 12345 )
.arg( 12345, 0, 16 );
// str == "12345 12,345 3039"
</pre>
<h3 class="fn"><a name="arg-8" /><a href="qstring.html">QString</a> QString.arg (<i>self</i>, <a href="qstring.html">QString</a> <i>a1</i>, <a href="qstring.html">QString</a> <i>a2</i>, <a href="qstring.html">QString</a> <i>a3</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p><i>base</i> is the base to use when converting the integer <i>a</i> into a string. <i>base</i> must be between 2 and 36, with 8 giving octal, 10 decimal, and 16 hexadecimal numbers.</p>
<h3 class="fn"><a name="arg-9" /><a href="qstring.html">QString</a> QString.arg (<i>self</i>, <a href="qstring.html">QString</a> <i>a1</i>, <a href="qstring.html">QString</a> <i>a2</i>, <a href="qstring.html">QString</a> <i>a3</i>, <a href="qstring.html">QString</a> <i>a4</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p><i>base</i> is the base to use when converting the integer <i>a</i> into a string. <i>base</i> must be between 2 and 36, with 8 giving octal, 10 decimal, and 16 hexadecimal numbers.</p>
<h3 class="fn"><a name="at" /><a href="qchar.html">QChar</a> QString.at (<i>self</i>, int <i>i</i>)</h3><p>Returns the character at index position <i>i</i> in the string.</p>
<p><i>i</i> must be a valid index position in the string (i.e., 0 <= <i>i</i> < <a href="qstring.html#size">size</a>()).</p>
<p>See also <a href="qstring.html#operator-5b-5d">operator[]</a>().</p>
<h3 class="fn"><a name="capacity" />int QString.capacity (<i>self</i>)</h3><p>Returns the maximum number of characters that can be stored in the string without forcing a reallocation.</p>
<p>The sole purpose of this function is to provide a means of fine tuning <a href="qstring.html">QString</a>'s memory usage. In general, you will rarely ever need to call this function. If you want to know how many characters are in the string, call <a href="qstring.html#size">size</a>().</p>
<p>See also <a href="qstring.html#reserve">reserve</a>() and <a href="qstring.html#squeeze">squeeze</a>().</p>
<h3 class="fn"><a name="chop" />QString.chop (<i>self</i>, int <i>n</i>)</h3><p>Removes <i>n</i> characters from the end of the string.</p>
<p>If <i>n</i> is greater than <a href="qstring.html#size">size</a>(), the result is an empty string.</p>
<p>Example:</p>
<pre>
QString str("LOGOUT\r\n");
str.chop(2);
// str == "LOGOUT"
</pre>
<p>If you want to remove characters from the <i>beginning</i> of the string, use <a href="qstring.html#remove">remove</a>() instead.</p>
<p>See also <a href="qstring.html#truncate">truncate</a>(), <a href="qstring.html#resize">resize</a>(), and <a href="qstring.html#remove">remove</a>().</p>
<h3 class="fn"><a name="clear" />QString.clear (<i>self</i>)</h3><p>Clears the contents of the string and makes it empty.</p>
<p>See also <a href="qstring.html#resize">resize</a>() and <a href="qstring.html#isEmpty">isEmpty</a>().</p>
<h3 class="fn"><a name="compare" />int QString.compare (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><p>Lexically compares <i>s1</i> with <i>s2</i> and returns an integer less than, equal to, or greater than zero if <i>s1</i> is less than, equal to, or greater than <i>s2</i>.</p>
<p>The comparison is based exclusively on the numeric Unicode values of the characters and is very fast, but is not what a human would expect. Consider sorting user-visible strings with <a href="qstring.html#localeAwareCompare">localeAwareCompare</a>().</p>
<pre>
int x = QString.compare("auto", "auto"); // x == 0
int y = QString.compare("auto", "car"); // y < 0
int z = QString.compare("car", "auto"); // z > 0
</pre>
<p>See also <a href="qstring.html#localeAwareCompare">localeAwareCompare</a>(), <a href="qstring.html#operator-eq-eq">operator==</a>(), <a href="qstring.html#operator-lt">operator<</a>(), and <a href="qstring.html#operator-gt">operator></a>().</p>
<h3 class="fn"><a name="compare-2" />int QString.compare (<a href="qstring.html">QString</a> <i>s1</i>, <a href="qstring.html">QString</a> <i>s2</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Same as compare(*this, <i>other</i>).</p>
<h3 class="fn"><a name="contains" />bool QString.contains (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>Returns true if this string contains an occurrence of the string <i>str</i>; otherwise returns false.</p>
<p>If <i>cs</i> is <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitive</a> (the default), the search is case sensitive; otherwise the search is case insensitive.</p>
<p>Example:</p>
<pre>
QString str = "Peter Pan";
str.contains("peter", Qt.CaseInsensitive); // returns true
</pre>
<p>See also <a href="qstring.html#indexOf">indexOf</a>() and <a href="qstring.html#count">count</a>().</p>
<h3 class="fn"><a name="contains-2" />bool QString.contains (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><h3 class="fn"><a name="contains-3" />bool QString.contains (<i>self</i>, <a href="qregexp.html">QRegExp</a> <i>rx</i>)</h3><h3 class="fn"><a name="count" />int QString.count (<i>self</i>)</h3><p>Returns the number of (potentially overlapping) occurrences of the string <i>str</i> in this string.</p>
<p>If <i>cs</i> is <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitive</a> (the default), the search is case sensitive; otherwise the search is case insensitive.</p>
<p>See also <a href="qstring.html#contains">contains</a>() and <a href="qstring.html#indexOf">indexOf</a>().</p>
<h3 class="fn"><a name="count-2" />int QString.count (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Returns the number of occurrences of character <i>ch</i> in the string.</p>
<h3 class="fn"><a name="count-3" />int QString.count (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Returns the number of times the regular expression <i>rx</i> matches in the string.</p>
<p>This function counts overlapping matches, so in the example below, there are four instances of "ana" or "ama":</p>
<pre>
QString str = "banana and panama";
str.contains(QRegExp("a[nm]a")); // returns 4
</pre>
<h3 class="fn"><a name="count-4" />int QString.count (<i>self</i>, <a href="qregexp.html">QRegExp</a>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Same as <a href="qstring.html#size">size</a>().</p>
<h3 class="fn"><a name="endsWith" />bool QString.endsWith (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>Returns true if the string ends with <i>s</i>; otherwise returns false.</p>
<p>If <i>cs</i> is <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitive</a> (the default), the search is case sensitive; otherwise the search is case insensitive.</p>
<pre>
QString str = "Bananas";
str.endsWith("anas"); // returns true
str.endsWith("pple"); // returns false
</pre>
<p>See also <a href="qstring.html#startsWith">startsWith</a>().</p>
<h3 class="fn"><a name="endsWith-2" />bool QString.endsWith (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><h3 class="fn"><a name="endsWith-3" />bool QString.endsWith (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>This is an overloaded member function, provided for convenience.</p>
<h3 class="fn"><a name="fill" /><a href="qstring.html">QString</a> QString.fill (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>, int <i>size</i> = -1)</h3><p>Sets every character in the string to character <i>ch</i>. If <i>size</i> is different from -1 (the default), the string is resized to <i>size</i> beforehand.</p>
<p>Example:</p>
<pre>
QString str = "Berlin";
str.fill("z");
// str == "zzzzzz"
str.fill("A", 2);
// str == "AA"
</pre>
<p>See also <a href="qstring.html#resize">resize</a>().</p>
<h3 class="fn"><a name="fromAscii" /><a href="qstring.html">QString</a> QString.fromAscii (str, int <i>size</i> = -1)</h3><p>Returns a <a href="qstring.html">QString</a> initialized with the first <i>size</i> characters of the 8-bit ASCII string <i>str</i>.</p>
<p>If <i>size</i> is -1 (the default), it is taken to be qstrlen(<i>str</i>).</p>
<p>If a codec has been set using <a href="qtextcodec.html#setCodecForCStrings">QTextCodec.setCodecForCStrings</a>(), it is used to convert <i>str</i> to Unicode; otherwise this function does the same as <a href="qstring.html#fromLatin1">fromLatin1</a>().</p>
<p>See also <a href="qstring.html#toAscii">toAscii</a>(), <a href="qstring.html#fromLatin1">fromLatin1</a>(), <a href="qstring.html#fromUtf8">fromUtf8</a>(), and <a href="qstring.html#fromLocal8Bit">fromLocal8Bit</a>().</p>
<h3 class="fn"><a name="fromLatin1" /><a href="qstring.html">QString</a> QString.fromLatin1 (str, int <i>size</i> = -1)</h3><p>Returns a <a href="qstring.html">QString</a> initialized with the first <i>size</i> characters of the Latin-1 string <i>str</i>.</p>
<p>If <i>size</i> is -1 (the default), it is taken to be qstrlen(<i>str</i>).</p>
<p>See also <a href="qstring.html#toLatin1">toLatin1</a>(), <a href="qstring.html#fromAscii">fromAscii</a>(), <a href="qstring.html#fromUtf8">fromUtf8</a>(), and <a href="qstring.html#fromLocal8Bit">fromLocal8Bit</a>().</p>
<h3 class="fn"><a name="fromLocal8Bit" /><a href="qstring.html">QString</a> QString.fromLocal8Bit (str, int <i>size</i> = -1)</h3><p>Returns a <a href="qstring.html">QString</a> initialized with the first <i>size</i> characters of the 8-bit string <i>str</i>.</p>
<p>If <i>size</i> is -1 (the default), it is taken to be qstrlen(<i>str</i>).</p>
<p><a href="qtextcodec.html#codecForLocale">QTextCodec.codecForLocale</a>() is used to perform the conversion from Unicode.</p>
<p>See also <a href="qstring.html#toLocal8Bit">toLocal8Bit</a>(), <a href="qstring.html#fromAscii">fromAscii</a>(), <a href="qstring.html#fromLatin1">fromLatin1</a>(), and <a href="qstring.html#fromUtf8">fromUtf8</a>().</p>
<h3 class="fn"><a name="fromUtf8" /><a href="qstring.html">QString</a> QString.fromUtf8 (str, int <i>size</i> = -1)</h3><p>Returns a <a href="qstring.html">QString</a> initialized with the first <i>size</i> bytes of the UTF-8 string <i>str</i>.</p>
<p>If <i>size</i> is -1 (the default), it is taken to be qstrlen(<i>str</i>).</p>
<p>See also <a href="qstring.html#toUtf8">toUtf8</a>(), <a href="qstring.html#fromAscii">fromAscii</a>(), <a href="qstring.html#fromLatin1">fromLatin1</a>(), and <a href="qstring.html#fromLocal8Bit">fromLocal8Bit</a>().</p>
<h3 class="fn"><a name="indexOf" />int QString.indexOf (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>, int <i>from</i> = 0, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>Returns the index position of the first occurrence of the string <i>str</i> in this string, searching forward from index position <i>from</i>. Returns -1 if <i>str</i> is not found.</p>
<p>If <i>cs</i> is <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitive</a> (the default), the search is case sensitive; otherwise the search is case insensitive.</p>
<p>Example:</p>
<pre>
QString x = "sticky question";
QString y = "sti";
x.indexOf(y); // returns 0
x.indexOf(y, 1); // returns 10
x.indexOf(y, 10); // returns 10
x.indexOf(y, 11); // returns -1
</pre>
<p>If <i>from</i> is -1, the search starts at the last character; if it is -2, at the next to last character and so on.</p>
<p>See also <a href="qstring.html#lastIndexOf">lastIndexOf</a>(), <a href="qstring.html#contains">contains</a>(), and <a href="qstring.html#count">count</a>().</p>
<h3 class="fn"><a name="indexOf-2" />int QString.indexOf (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>, int <i>from</i> = 0, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Returns the index position of the first occurrence of the character <i>ch</i> in the string, searching forward from index position <i>from</i>. Returns -1 if <i>ch</i> could not be found.</p>
<h3 class="fn"><a name="indexOf-3" />int QString.indexOf (<i>self</i>, <a href="qregexp.html">QRegExp</a>, int <i>from</i> = 0)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Returns the index position of the first match of the regular expression <i>rx</i> in the string, searching forward from index position <i>from</i>. Returns -1 if <i>rx</i> didn't match anywhere.</p>
<p>Example:</p>
<pre>
QString str = "the minimum";
str.indexOf(QRegExp("m[aeiou]"), 0); // returns 4
</pre>
<h3 class="fn"><a name="insert" /><a href="qstring.html">QString</a> QString.insert (<i>self</i>, int <i>i</i>, <a href="qchar.html">QChar</a> <i>c</i>)</h3><p>Inserts the string <i>str</i> at index position <i>i</i> and returns a reference to this string.</p>
<p>Example:</p>
<pre>
QString str = "Meal";
str.insert(1, QString("ontr"));
// str == "Montreal"
</pre>
<p>If <i>i</i> is greater than <a href="qstring.html#size">size</a>(), the array is first extended using <a href="qstring.html#resize">resize</a>().</p>
<p>See also <a href="qstring.html#append">append</a>(), <a href="qstring.html#prepend">prepend</a>(), <a href="qstring.html#replace">replace</a>(), and <a href="qstring.html#remove">remove</a>().</p>
<h3 class="fn"><a name="insert-2" /><a href="qstring.html">QString</a> QString.insert (<i>self</i>, int <i>i</i>, <a href="qchar.html">QChar</a> <i>uc</i>, int <i>len</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Inserts the Latin-1 string <i>str</i> at index position <i>i</i>.</p>
<h3 class="fn"><a name="insert-3" /><a href="qstring.html">QString</a> QString.insert (<i>self</i>, int <i>i</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Inserts the first <i>size</i> characters of the <a href="qchar.html">QChar</a> array <i>unicode</i> at index position <i>i</i> in the string.</p>
<h3 class="fn"><a name="insert-4" /><a href="qstring.html">QString</a> QString.insert (<i>self</i>, int <i>i</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Inserts <i>ch</i> at index position <i>i</i> in the string.</p>
<h3 class="fn"><a name="isEmpty" />bool QString.isEmpty (<i>self</i>)</h3><p>Returns true if the string has no characters; otherwise returns false.</p>
<p>Example:</p>
<pre>
QString().isEmpty(); // returns true
QString("").isEmpty(); // returns true
QString("x").isEmpty(); // returns false
QString("abc").isEmpty(); // returns false
</pre>
<p>See also <a href="qstring.html#size">size</a>().</p>
<h3 class="fn"><a name="isNull" />bool QString.isNull (<i>self</i>)</h3><p>Returns true if this string is null; otherwise returns false.</p>
<p>Example:</p>
<pre>
QString().isNull(); // returns true
QString("").isNull(); // returns false
QString("abc").isNull(); // returns false
</pre>
<p>Qt makes a distinction between null strings and empty strings for historical reasons. For most applications, what matters is whether or not a string contains any data, and this can be determined using <a href="qstring.html#isEmpty">isEmpty</a>().</p>
<p>See also <a href="qstring.html#isEmpty">isEmpty</a>().</p>
<h3 class="fn"><a name="isRightToLeft" />bool QString.isRightToLeft (<i>self</i>)</h3><h3 class="fn"><a name="isSimpleText" />bool QString.isSimpleText (<i>self</i>)</h3><h3 class="fn"><a name="lastIndexOf" />int QString.lastIndexOf (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>, int <i>from</i> = -1, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>Returns the index position of the last occurrence of the string <i>str</i> in this string, searching backward from index position <i>from</i>. If <i>from</i> is -1 (the default), the search starts at the last character; if <i>from</i> is -2, at the next to last character and so on. Returns -1 if <i>str</i> is not found.</p>
<p>If <i>cs</i> is <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitive</a> (the default), the search is case sensitive; otherwise the search is case insensitive.</p>
<p>Example:</p>
<pre>
QString x = "crazy azimuths";
QString y = "az";
x.lastIndexOf(y); // returns 6
x.lastIndexOf(y, 6); // returns 6
x.lastIndexOf(y, 5); // returns 2
x.lastIndexOf(y, 1); // returns -1
</pre>
<p>See also <a href="qstring.html#indexOf">indexOf</a>(), <a href="qstring.html#contains">contains</a>(), and <a href="qstring.html#count">count</a>().</p>
<h3 class="fn"><a name="lastIndexOf-2" />int QString.lastIndexOf (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>, int <i>from</i> = -1, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Returns the index position of the last occurrence of the character <i>ch</i>, searching backward from position <i>from</i>.</p>
<h3 class="fn"><a name="lastIndexOf-3" />int QString.lastIndexOf (<i>self</i>, <a href="qregexp.html">QRegExp</a>, int <i>from</i> = -1)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Returns the index position of the last match of the regular expression <i>rx</i> in the string, searching backward from index position <i>from</i>. Returns -1 if <i>rx</i> didn't match anywhere.</p>
<p>Example:</p>
<pre>
QString str = "the minimum";
str.lastIndexOf(QRegExp("m[aeiou]")); // returns 8
</pre>
<h3 class="fn"><a name="left" /><a href="qstring.html">QString</a> QString.left (<i>self</i>, int <i>len</i>)</h3><p>Returns a substring that contains the <i>len</i> leftmost characters of the string.</p>
<p>The entire string is returned if <i>len</i> is greater than <a href="qstring.html#size">size</a>() or less than zero.</p>
<pre>
QString x = "Pineapple";
QString y = x.left(4); // y == "Pine"
</pre>
<p>See also <a href="qstring.html#right">right</a>(), <a href="qstring.html#mid">mid</a>(), and <a href="qstring.html#startsWith">startsWith</a>().</p>
<h3 class="fn"><a name="leftJustified" /><a href="qstring.html">QString</a> QString.leftJustified (<i>self</i>, int <i>width</i>, <a href="qchar.html">QChar</a> <i>fill</i> = QLatin1Char(32), bool <i>trunc</i> = False)</h3><p>Returns a string of <a href="qstring.html#size">size</a>() <i>width</i> that contains this string padded by the <i>fill</i> character.</p>
<p>If <i>truncate</i> is false and the <a href="qstring.html#size">size</a>() of the string is more than <i>width</i>, then the returned string is a copy of the string.</p>
<p>If <i>truncate</i> is true and the <a href="qstring.html#size">size</a>() of the string is more than <i>width</i>, then any characters in a copy of the string after position <i>width</i> are removed, and the copy is returned.</p>
<pre>
QString s = "apple";
QString t = s.leftJustified(8, '.'); // t == "apple..."
</pre>
<p>See also <a href="qstring.html#rightJustified">rightJustified</a>().</p>
<h3 class="fn"><a name="length" />int QString.length (<i>self</i>)</h3><p>Same as <a href="qstring.html#size">size</a>().</p>
<p>See also <a href="qstring-qt3.html#setLength">setLength</a>().</p>
<h3 class="fn"><a name="localeAwareCompare" />int QString.localeAwareCompare (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><p>Compares <i>s1</i> with <i>s2</i> and returns an integer less than, equal to, or greater than zero if <i>s1</i> is less than, equal to, or greater than <i>s2</i>.</p>
<p>The comparison is performed in a locale- and also platform-dependent manner. Use this function to present sorted lists of strings to the user.</p>
<p>See also <a href="qstring.html#compare">compare</a>() and <a href="qtextcodec-qt3.html#locale">QTextCodec.locale</a>().</p>
<h3 class="fn"><a name="localeAwareCompare-2" />int QString.localeAwareCompare (<a href="qstring.html">QString</a> <i>s1</i>, <a href="qstring.html">QString</a> <i>s2</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Same as localeAwareCompare(*this, <i>other</i>).</p>
<h3 class="fn"><a name="mid" /><a href="qstring.html">QString</a> QString.mid (<i>self</i>, int <i>i</i>, int <i>len</i> = -1)</h3><p>Returns a string that contains the <i>len</i> characters of this string, starting at position <i>i</i>.</p>
<p>Returns an empty string if index <i>i</i> exceeds the length of the string. If there are less than <i>len</i> characters available in the string starting at position <i>i</i>, or if <i>len</i> is -1 (the default), the function returns all characters that are available from position <i>i</i>.</p>
<p>Example:</p>
<pre>
QString x = "Nine pineapples";
QString y = x.mid(5, 4); // y == "pine"
QString z = x.mid(5); // z == "pineapples"
</pre>
<p>See also <a href="qstring.html#left">left</a>() and <a href="qstring.html#right">right</a>().</p>
<h3 class="fn"><a name="normalized" /><a href="qstring.html">QString</a> QString.normalized (<i>self</i>, <a href="qstring.html#NormalizationForm-enum">NormalizationForm</a> <i>mode</i>)</h3><p>Returns the string in the given Unicode normalization <i>form</i>.</p>
<h3 class="fn"><a name="normalized-2" /><a href="qstring.html">QString</a> QString.normalized (<i>self</i>, <a href="qstring.html#NormalizationForm-enum">NormalizationForm</a> <i>mode</i>, <a href="qchar.html#UnicodeVersion-enum">QChar.UnicodeVersion</a> <i>version</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Returns the string in the given Unicode normalization <i>form</i>, according to the given <i>version</i> of the Unicode standard.</p>
<h3 class="fn"><a name="number" /><a href="qstring.html">QString</a> QString.number (int, int <i>base</i> = 10)</h3><p>Returns a string equivalent of the number <i>n</i> to base <i>base</i>, which is 10 by default and must be between 2 and 36.</p>
<pre>
long a = 63;
QString str = QString.number(a, 16); // str == "3f"
QString str = QString.number(a, 16).upper(); // str == "3F"
</pre>
<p>See also <a href="qstring.html#setNum">setNum</a>().</p>
<h3 class="fn"><a name="number-2" /><a href="qstring.html">QString</a> QString.number (float, char <i>f</i> = 'g', int <i>prec</i> = 6)</h3><p>This is an overloaded member function, provided for convenience.</p>
<h3 class="fn"><a name="number-3" /><a href="qstring.html">QString</a> QString.number (long, int <i>base</i> = 10)</h3><p>This is an overloaded member function, provided for convenience.</p>
<h3 class="fn"><a name="number-4" /><a href="qstring.html">QString</a> QString.number (unsigned long, int <i>base</i> = 10)</h3><p>This is an overloaded member function, provided for convenience.</p>
<h3 class="fn"><a name="prepend" /><a href="qstring.html">QString</a> QString.prepend (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>)</h3><p>Prepends the string <i>str</i> to the beginning of this string and returns a reference to this string.</p>
<p>Example:</p>
<pre>
QString x = "ship";
QString y = "air";
x.prepend(y);
// x == "airship"
</pre>
<p>See also <a href="qstring.html#append">append</a>() and <a href="qstring.html#insert">insert</a>().</p>
<h3 class="fn"><a name="prepend-2" /><a href="qstring.html">QString</a> QString.prepend (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Prepends the Latin-1 string <i>str</i> to this string.</p>
<h3 class="fn"><a name="prepend-3" /><a href="qstring.html">QString</a> QString.prepend (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Prepends the byte array <i>ba</i> to this string. <i>ba</i> is converted to Unicode using <a href="qstring.html#fromAscii">fromAscii</a>().</p>
<p>You can disable this function by defining <tt>QT_NO_CAST_FROM_ASCII</tt> when you compile your applications. This can be useful if you want to ensure that all user-visible strings go through <a href="qobject.html#tr">QObject.tr</a>(), for example.</p>
<h3 class="fn"><a name="prepend-4" /><a href="qstring.html">QString</a> QString.prepend (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>s</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Prepends the string <i>str</i> to this string. <i>str</i> is converted to Unicode using <a href="qstring.html#fromAscii">fromAscii</a>().</p>
<p>You can disable this function by defining <tt>QT_NO_CAST_FROM_ASCII</tt> when you compile your applications. This can be useful if you want to ensure that all user-visible strings go through <a href="qobject.html#tr">QObject.tr</a>(), for example.</p>
<h3 class="fn"><a name="push_back" />QString.push_back (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>)</h3><p>This function is provided for STL compatibility. It is equivalent to append(<i>other</i>).</p>
<h3 class="fn"><a name="push_back-2" />QString.push_back (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Same as append(<i>ch</i>).</p>
<h3 class="fn"><a name="push_front" />QString.push_front (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>)</h3><p>This function is provided for STL compatibility. It is equivalent to prepend(<i>other</i>).</p>
<h3 class="fn"><a name="push_front-2" />QString.push_front (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Same as prepend(<i>ch</i>).</p>
<h3 class="fn"><a name="remove" /><a href="qstring.html">QString</a> QString.remove (<i>self</i>, int <i>i</i>, int <i>len</i>)</h3><p>Removes <i>len</i> characters from the string, starting at index position <i>pos</i>, and returns a reference to the string.</p>
<p>If <i>pos</i> is within the string, but <i>pos</i> + <i>len</i> is beyond the end of the string, the string is truncated at position <i>pos</i>.</p>
<pre>
QString str = "Montreal";
str.remove(1, 4);
// str == "Meal"
</pre>
<p>See also <a href="qstring.html#insert">insert</a>() and <a href="qstring.html#replace">replace</a>().</p>
<h3 class="fn"><a name="remove-2" /><a href="qstring.html">QString</a> QString.remove (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><h3 class="fn"><a name="remove-3" /><a href="qstring.html">QString</a> QString.remove (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><h3 class="fn"><a name="remove-4" /><a href="qstring.html">QString</a> QString.remove (<i>self</i>, <a href="qregexp.html">QRegExp</a> <i>rx</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Removes every occurrence of <i>str</i> in this string. Returns a reference to this string.</p>
<p>If <i>cs</i> is <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitive</a> (the default), the search is case sensitive; otherwise the search is case insensitive.</p>
<p>This is the same as replace(<i>str</i>, "", <i>cs</i>).</p>
<h3 class="fn"><a name="replace" /><a href="qstring.html">QString</a> QString.replace (<i>self</i>, int <i>i</i>, int <i>len</i>, <a href="qchar.html">QChar</a> <i>after</i>)</h3><p>Replaces <i>len</i> characters from index position <i>pos</i> with the string <i>after</i>, and returns a reference to this string.</p>
<p>Example:</p>
<pre>
QString x = "Say yes!";
QString y = "no";
x.replace(4, 3, y);
// x == "Say no!"
</pre>
<p>See also <a href="qstring.html#insert">insert</a>() and <a href="qstring.html#remove">remove</a>().</p>
<h3 class="fn"><a name="replace-2" /><a href="qstring.html">QString</a> QString.replace (<i>self</i>, int <i>i</i>, int <i>len</i>, <a href="qchar.html">QChar</a> <i>s</i>, int <i>slen</i>)</h3><h3 class="fn"><a name="replace-3" /><a href="qstring.html">QString</a> QString.replace (<i>self</i>, int <i>i</i>, int <i>len</i>, <a href="qstring.html">QString</a> <i>after</i>)</h3><h3 class="fn"><a name="replace-4" /><a href="qstring.html">QString</a> QString.replace (<i>self</i>, <a href="qchar.html">QChar</a> <i>before</i>, <a href="qchar.html">QChar</a> <i>after</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><h3 class="fn"><a name="replace-5" /><a href="qstring.html">QString</a> QString.replace (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>, <a href="qstring.html">QString</a> <i>after</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><h3 class="fn"><a name="replace-6" /><a href="qstring.html">QString</a> QString.replace (<i>self</i>, <a href="qstring.html">QString</a> <i>before</i>, <a href="qstring.html">QString</a> <i>after</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Replaces <i>len</i> characters from index position <i>pos</i> with the first <i>size</i> characters of the <a href="qchar.html">QChar</a> array <i>unicode</i>.</p>
<h3 class="fn"><a name="replace-7" /><a href="qstring.html">QString</a> QString.replace (<i>self</i>, <a href="qregexp.html">QRegExp</a> <i>rx</i>, <a href="qstring.html">QString</a> <i>after</i>)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Replaces <i>len</i> characters from index position <i>pos</i> with the character <i>after</i>.</p>
<h3 class="fn"><a name="reserve" />QString.reserve (<i>self</i>, int <i>asize</i>)</h3><p>Attempts to allocate memory for at least <i>size</i> characters. If you know in advance how large the string will be, you can call this function, and if you resize the string often you are likely to get better performance. If <i>size</i> is an underestimate, the worst that will happen is that the <a href="qstring.html">QString</a> will be a bit slower.</p>
<p>The sole purpose of this function is to provide a means of fine tuning <a href="qstring.html">QString</a>'s memory usage. In general, you will rarely ever need to call this function. If you want to change the size of the string, call <a href="qstring.html#resize">resize</a>().</p>
<p>This function is useful for code that needs to build up a long string and wants to avoid repeated reallocation. In this example, we want to add to the string until some condition is true, and we're fairly sure that size is large enough to make a call to reserve() worthwhile:</p>
<pre>
QString result;
int len = 0;
result.reserve(maxSize);
while (...) {
result[len++] = getNextChar(); // fill part of the space
}
result.squeeze();
</pre>
<p>See also <a href="qstring.html#squeeze">squeeze</a>() and <a href="qstring.html#capacity">capacity</a>().</p>
<h3 class="fn"><a name="resize" />QString.resize (<i>self</i>, int <i>size</i>)</h3><p>Sets the size of the string to <i>size</i> characters.</p>
<p>If <i>size</i> is greater than the current size, the string is extended to make it <i>size</i> characters long with the extra characters added to the end. The new characters are uninitialized.</p>
<p>If <i>size</i> is less than the current size, characters are removed from the end.</p>
<p>Example:</p>
<pre>
QString str = "Hello world";
str.resize(5);
// str == "Hello"
str.resize(8);
// str == "Hello???" (where ? stands for any character)
</pre>
<p>If you want to append a certain number of identical characters to the string, use operator+=() as follows rather than resize():</p>
<pre>
QString str = "Hello";
str += QString(10, 'X');
// str == "HelloXXXXXXXXXX"
</pre>
<p>If you want to expand the string so that it reaches a certain width and fill the new positions with a particular character, use <a href="qstring.html#leftJustified">leftJustified</a>():</p>
<pre>
QString str = "Hello";
str = str.leftJustified(10, ' ');
// str == "Hello "
</pre>
<p>See also <a href="qstring.html#truncate">truncate</a>() and <a href="qstring.html#reserve">reserve</a>().</p>
<h3 class="fn"><a name="right" /><a href="qstring.html">QString</a> QString.right (<i>self</i>, int <i>len</i>)</h3><p>Returns a substring that contains the <i>len</i> rightmost characters of the string.</p>
<p>The entire string is returned if <i>len</i> is greater than <a href="qstring.html#size">size</a>() or less than zero.</p>
<pre>
QString x = "Pineapple";
QString y = x.right(5); // y == "apple"
</pre>
<p>See also <a href="qstring.html#left">left</a>(), <a href="qstring.html#mid">mid</a>(), and <a href="qstring.html#endsWith">endsWith</a>().</p>
<h3 class="fn"><a name="rightJustified" /><a href="qstring.html">QString</a> QString.rightJustified (<i>self</i>, int <i>width</i>, <a href="qchar.html">QChar</a> <i>fill</i> = QLatin1Char(32), bool <i>trunc</i> = False)</h3><p>Returns a string of <a href="qstring.html#size">size</a>() <i>width</i> that contains the <i>fill</i> character followed by the string.</p>
<p>If <i>truncate</i> is false and the <a href="qstring.html#size">size</a>() of the string is more than <i>width</i>, then the returned string is a copy of the string.</p>
<p>If <i>truncate</i> is true and the <a href="qstring.html#size">size</a>() of the string is more than <i>width</i>, then the resulting string is truncated at position <i>width</i>.</p>
<pre>
QString str = "apple";
str = str.rightJustified(8, '.');
// str == "...apple"
</pre>
<p>See also <a href="qstring.html#leftJustified">leftJustified</a>().</p>
<h3 class="fn"><a name="section" /><a href="qstring.html">QString</a> QString.section (<i>self</i>, <a href="qstring.html">QString</a> <i>in_sep</i>, int <i>start</i>, int <i>end</i> = -1, <a href="qstring-sectionflags.html">SectionFlags</a> <i>flags</i> = QString.SectionDefault)</h3><p>This function returns a section of the string.</p>
<p>This string is treated as a sequence of fields separated by the character, <i>sep</i>. The returned string consists of the fields from position <i>start</i> to position <i>end</i> inclusive. If <i>end</i> is not specified, all fields from position <i>start</i> to the end of the string are included. Fields are numbered 0, 1, 2, etc., counting from the left, and -1, -2, etc., counting from right to left.</p>
<p>The <i>flags</i> argument can be used to affect some aspects of the function's behavior, e.g. whether to be case sensitive, whether to skip empty fields and how to deal with leading and trailing separators; see <a href="qstring.html#SectionFlag-enum">SectionFlags</a>.</p>
<pre>
QString csv = "forename,middlename,surname,phone";
QString str = csv.section(',', 2, 2); // str == "surname"
QString path = "/usr/local/bin/myapp"; // First field is empty
QString str = path.section('/', 3, 4); // str == "bin/myapp"
QString str = path.section('/', 3, 3, SectionSkipEmpty); // str == "myapp"
</pre>
<p>If <i>start</i> or <i>end</i> is negative, we count fields from the right of the string, the right-most field being -1, the one from right-most field being -2, and so on.</p>
<pre>
QString csv = "forename,middlename,surname,phone";
QString str = csv.section(',', -3, -2); // str == "middlename,surname"
QString path = "/usr/local/bin/myapp"; // First field is empty
QString str = path.section('/', -1); // str == "myapp"
</pre>
<p>See also <a href="qstring.html#split">split</a>().</p>
<h3 class="fn"><a name="section-2" /><a href="qstring.html">QString</a> QString.section (<i>self</i>, <a href="qregexp.html">QRegExp</a> <i>reg</i>, int <i>start</i>, int <i>end</i> = -1, <a href="qstring-sectionflags.html">SectionFlags</a> <i>flags</i> = QString.SectionDefault)</h3><p>This is an overloaded member function, provided for convenience.</p>
<pre>
QString data = "forename**middlename**surname**phone";
QString str = data.section("**", 2, 2); // str == "surname"
</pre>
<pre>
QString data = "forename**middlename**surname**phone";
QString str = data.section("**", -3, -2); // str == "middlename**surname"
</pre>
<p>See also <a href="qstring.html#split">split</a>().</p>
<h3 class="fn"><a name="section-3" /><a href="qstring.html">QString</a> QString.section (<i>self</i>, <a href="qchar.html">QChar</a> <i>asep</i>, int <i>astart</i>, int <i>aend</i> = -1, <a href="qstring-sectionflags.html">SectionFlags</a> <i>aflags</i> = QString.SectionDefault)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>This string is treated as a sequence of fields separated by the regular expression, <i>reg</i>.</p>
<pre>
QString line = "forename\tmiddlename surname \t \t phone";
QRegExp sep("\\s+");
QString s = line.section(sep, 2, 2); // s == "surname"
</pre>
<pre>
QString line = "forename\tmiddlename surname \t \t phone";
QRegExp sep("\\s+");
QString s = line.section(sep, -3, -2); // s == "middlename surname"
</pre>
<p><b>Warning:</b> Using this <a href="qregexp.html">QRegExp</a> version is much more expensive than the overloaded string and character versions.</p>
<p>See also <a href="qstring.html#split">split</a>() and <a href="qstring.html#simplified">simplified</a>().</p>
<h3 class="fn"><a name="setNum" /><a href="qstring.html">QString</a> QString.setNum (<i>self</i>, int <i>n</i>, int <i>base</i> = 10)</h3><p>Sets the string to the printed value of <i>n</i> in base <i>base</i> and returns a reference to the string.</p>
<p>The base is 10 by default and must be between 2 and 36.</p>
<pre>
QString str;
str.setNum(1234); // str == "1234"
</pre>
<h3 class="fn"><a name="setNum-2" /><a href="qstring.html">QString</a> QString.setNum (<i>self</i>, float, char <i>f</i> = 'g', int <i>prec</i> = 6)</h3><p>This is an overloaded member function, provided for convenience.</p>
<h3 class="fn"><a name="setNum-3" /><a href="qstring.html">QString</a> QString.setNum (<i>self</i>, long, int <i>base</i> = 10)</h3><p>This is an overloaded member function, provided for convenience.</p>
<h3 class="fn"><a name="setNum-4" /><a href="qstring.html">QString</a> QString.setNum (<i>self</i>, unsigned long, int <i>base</i> = 10)</h3><p>This is an overloaded member function, provided for convenience.</p>
<h3 class="fn"><a name="simplified" /><a href="qstring.html">QString</a> QString.simplified (<i>self</i>)</h3><p>Returns a string that has whitespace removed from the start and the end, and that has each sequence of internal whitespace replaced with a single space.</p>
<p>Whitespace means any character for which <a href="qchar.html#isSpace">QChar.isSpace</a>() returns true. This includes the ASCII characters '\t', '\n', '\v', '\f', '\r', and ' '.</p>
<p>Example:</p>
<pre>
QString str = " lots\t of\nwhitespace\r\n ";
str = str.simplified();
// str == "lots of whitespace";
</pre>
<p>See also <a href="qstring.html#trimmed">trimmed</a>().</p>
<h3 class="fn"><a name="size" />int QString.size (<i>self</i>)</h3><p>Returns the number of characters in this string.</p>
<p>The last character in the string is at position size() - 1. In addition, <a href="qstring.html">QString</a> ensures that the character at position size() is always '\0', so that you can use the return value of <a href="qstring.html#data">data</a>() and <a href="qstring.html#constData">constData</a>() as arguments to functions that expect '\0'-terminated strings.</p>
<p>Example:</p>
<pre>
QString str = "World";
int n = str.size(); // n == 5
str.data()[0]; // returns 'W'
str.data()[4]; // returns 'd'
str.data()[5]; // returns '\0'
</pre>
<p>See also <a href="qstring.html#isEmpty">isEmpty</a>() and <a href="qstring.html#resize">resize</a>().</p>
<h3 class="fn"><a name="split" /><a href="qstringlist.html">QStringList</a> QString.split (<i>self</i>, <a href="qstring.html">QString</a> <i>sep</i>, <a href="qstring.html#SplitBehavior-enum">SplitBehavior</a> <i>behavior</i> = QString.KeepEmptyParts, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>Splits the string into substrings wherever <i>sep</i> occurs, and returns the list of those strings. If <i>sep</i> does not match anywhere in the string, split() returns a single-element list containing this string.</p>
<p>If <i>cs</i> is true, the string is only split only where characters are found that match <i>sep</i> exactly. If <i>cs</i> is false, the string is split, the string is split where characters are found that match <i>sep</i> case insensitively (e.g. "and" matches "AND").</p>
<p>If <i>behavior</i> is <a href="qstring.html#SplitBehavior-enum">QString.SkipEmptyParts</a>, empty entries don't appear in the result. By default, empty entries are kept.</p>
<p>Example:</p>
<pre>
QString str = "a,,b,c";
QStringList list1 = str.split(",");
// list1: [ "a", "", "b", "c" ]
QStringList list2 = str.split(",", QString.SkipEmptyParts);
// list2: [ "a", "b", "c" ]
</pre>
<p>See also <a href="qstringlist.html#join">QStringList.join</a>() and <a href="qstring.html#section">section</a>().</p>
<h3 class="fn"><a name="split-2" /><a href="qstringlist.html">QStringList</a> QString.split (<i>self</i>, <a href="qchar.html">QChar</a> <i>sep</i>, <a href="qstring.html#SplitBehavior-enum">SplitBehavior</a> <i>behavior</i> = QString.KeepEmptyParts, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>This is an overloaded member function, provided for convenience.</p>
<h3 class="fn"><a name="split-3" /><a href="qstringlist.html">QStringList</a> QString.split (<i>self</i>, <a href="qregexp.html">QRegExp</a> <i>sep</i>, <a href="qstring.html#SplitBehavior-enum">SplitBehavior</a> <i>behavior</i> = QString.KeepEmptyParts)</h3><p>This is an overloaded member function, provided for convenience.</p>
<p>Splits the string into substrings wherever the regular expression <i>rx</i> matches, and returns the list of those strings. If <i>rx</i> does not match anywhere in the string, <a href="qstring.html#split">split</a>() returns a single-element list containing this string.</p>
<p>Here's an example where we extract the words in a sentence using one or more whitespace characters as the separator:</p>
<pre>
QString str = "Some text\n\twith strange whitespace.";
QStringList list = str.split(QRegExp("\\s+"));
// list: [ "Some", "text", "with", "strange", "whitespace." ]
</pre>
<p>Here's a similar example, but this time we use any sequence of non-word characters as the separator:</p>
<pre>
QString str = "This time, a normal English sentence.";
QStringList list = str.split(QRegExp("\\W+"),
QString.SkipEmptyParts);
// list: [ "This", "time", "a", "normal", "English", "sentence" ]
</pre>
<p>Here's a third example where we use a zero-length assertion, <b>\b</b> (word boundary), to split the string into an alternating sequence of non-word and word tokens:</p>
<pre>
QString str = "Now: this sentence fragment.";
QStringList list = str.split(QRegExp("\\b"));
// list: [ "", "Now", ": ", "this", " ", "sentence", " ", "fragment", "." ]
</pre>
<p>See also <a href="qstringlist.html#join">QStringList.join</a>() and <a href="qstring.html#section">section</a>().</p>
<h3 class="fn"><a name="squeeze" />QString.squeeze (<i>self</i>)</h3><p>Releases any memory not required to store the character data.</p>
<p>The sole purpose of this function is to provide a means of fine tuning <a href="qstring.html">QString</a>'s memory usage. In general, you will rarely ever need to call this function.</p>
<p>See also <a href="qstring.html#reserve">reserve</a>() and <a href="qstring.html#capacity">capacity</a>().</p>
<h3 class="fn"><a name="startsWith" />bool QString.startsWith (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>Returns true if the string starts with <i>s</i>; otherwise returns false.</p>
<p>If <i>cs</i> is <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitive</a> (the default), the search is case sensitive; otherwise the search is case insensitive.</p>
<pre>
QString str = "Bananas";
str.startsWith("Ban"); // returns true
str.startsWith("Car"); // returns false
</pre>
<p>See also <a href="qstring.html#endsWith">endsWith</a>().</p>
<h3 class="fn"><a name="startsWith-2" />bool QString.startsWith (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><h3 class="fn"><a name="startsWith-3" />bool QString.startsWith (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>, <a href="qt.html#CaseSensitivity-enum">Qt.CaseSensitivity</a> <i>cs</i> = Qt.CaseSensitive)</h3><p>This is an overloaded member function, provided for convenience.</p>
<h3 class="fn"><a name="toAscii" /><a href="qbytearray.html">QByteArray</a> QString.toAscii (<i>self</i>)</h3><p>Returns an 8-bit ASCII representation of the string as a <a href="qbytearray.html">QByteArray</a>.</p>
<p>If a codec has been set using <a href="qtextcodec.html#setCodecForCStrings">QTextCodec.setCodecForCStrings</a>(), it is used to convert Unicode to 8-bit char; otherwise this function does the same as <a href="qstring.html#toLatin1">toLatin1</a>().</p>
<p>See also <a href="qstring.html#fromAscii">fromAscii</a>(), <a href="qstring.html#toLatin1">toLatin1</a>(), <a href="qstring.html#toUtf8">toUtf8</a>(), <a href="qstring.html#toLocal8Bit">toLocal8Bit</a>(), and <a href="qtextcodec.html">QTextCodec</a>.</p>
<h3 class="fn"><a name="toDouble" />(float, bool <i>ok</i>) QString.toDouble (<i>self</i>)</h3><p>Returns the string converted to a <tt>double</tt> value.</p>
<p>Returns 0.0 if the conversion fails.</p>
<p>If <i>ok</i> is not 0: if a conversion error occurs, <tt>*</tt><i>ok</i> is set to false; otherwise <tt>*</tt><i>ok</i> is set to true.</p>
<pre>
QString str = "1234.56";
double val = str.toDouble(); // val == 1234.56
</pre>
<p>This function tries to interpret the string according to the current locale. The current locale is determined from the system at application startup and can be changed by calling <a href="qlocale.html#setDefault">QLocale.setDefault</a>(). If the string cannot be interpreted according to the current locale, this function falls back on the "C" locale.</p>
<pre>
bool ok;
double d;
QLocale.setDefault(QLocale.C);
d = QString( "1234,56" ).toDouble(&ok); // ok == false
d = QString( "1234.56" ).toDouble(&ok); // ok == true, d == 1234.56
QLocale.setDefault(QLocale.German);
d = QString( "1234,56" ).toDouble(&ok); // ok == true, d == 1234.56
d = QString( "1234.56" ).toDouble(&ok); // ok == true, d == 1234.56
</pre>
<p>Due to the ambiguity between the decimal point and thousands group separator in various locales, this function does not handle thousands group separators. If you need to convert such numbers, see <a href="qlocale.html#toDouble">QLocale.toDouble</a>().</p>
<pre>
bool ok;
QLocale.setDefault(QLocale.C);
double d = QString( "1,234,567.89" ).toDouble(&ok); // ok == false
</pre>
<p><b>Warning:</b> If the string contains trailing whitespace this function will fail, and set <tt>*</tt><i>ok</i> to false if <i>ok</i> is not 0. Leading whitespace is ignored.</p>
<p>See also <a href="qstring.html#number">number</a>(), <a href="qlocale.html#setDefault">QLocale.setDefault</a>(), <a href="qlocale.html#toDouble">QLocale.toDouble</a>(), and <a href="qstring.html#trimmed">trimmed</a>().</p>
<h3 class="fn"><a name="toFloat" />(float, bool <i>ok</i>) QString.toFloat (<i>self</i>)</h3><p>Returns the string converted to a <tt>float</tt> value.</p>
<p>Returns 0.0 if the conversion fails.</p>
<p>If <i>ok</i> is not 0: if a conversion error occurs, *<i>ok</i> is set to false; otherwise *<i>ok</i> is set to true.</p>
<p>Example:</p>
<pre>
QString str1 = "1234.56";
str1.toFloat(); // returns 1234.56
bool ok;
QString str2 = "R2D2";
str2.toFloat(&ok); // returns 0.0, sets ok to false
</pre>
<p>See also <a href="qstring.html#number">number</a>(), <a href="qstring.html#toDouble">toDouble</a>(), and <a href="qstring.html#toInt">toInt</a>().</p>
<h3 class="fn"><a name="toInt" />(int, bool <i>ok</i>) QString.toInt (<i>self</i>, int <i>base</i> = 10)</h3><p>Returns the string converted to an <tt>int</tt> using base <i>base</i>, which is 10 by default and must be between 2 and 36, or 0. Returns 0 if the conversion fails.</p>
<p>If <i>ok</i> is not 0: if a conversion error occurs, *<i>ok</i> is set to false; otherwise *<i>ok</i> is set to true.</p>
<p>If <i>base</i> is 0, the C language convention is used: If the string begins with "0x", base 16 is used; if the string begins with "0", base 8 is used; otherwise, base 10 is used.</p>
<p>Example:</p>
<pre>
QString str = "FF";
bool ok;
int hex = str.toInt(&ok, 16); // hex == 255, ok == true
int dec = str.toInt(&ok, 10); // dec == 0, ok == false
</pre>
<p>See also <a href="qstring.html#number">number</a>(), <a href="qstring.html#toUInt">toUInt</a>(), and <a href="qstring.html#toDouble">toDouble</a>().</p>
<h3 class="fn"><a name="toLatin1" /><a href="qbytearray.html">QByteArray</a> QString.toLatin1 (<i>self</i>)</h3><p>Returns a Latin-1 representation of the string as a <a href="qbytearray.html">QByteArray</a>. The returned byte array is undefined if the string contains non-Latin1 characters.</p>
<p>See also <a href="qstring.html#fromLatin1">fromLatin1</a>(), <a href="qstring.html#toAscii">toAscii</a>(), <a href="qstring.html#toUtf8">toUtf8</a>(), <a href="qstring.html#toLocal8Bit">toLocal8Bit</a>(), and <a href="qtextcodec.html">QTextCodec</a>.</p>
<h3 class="fn"><a name="toLocal8Bit" /><a href="qbytearray.html">QByteArray</a> QString.toLocal8Bit (<i>self</i>)</h3><p>Returns the local 8-bit representation of the string as a <a href="qbytearray.html">QByteArray</a>. The returned byte array is undefined if the string contains characters not supported by the local 8-bit encoding.</p>
<p><a href="qtextcodec.html#codecForLocale">QTextCodec.codecForLocale</a>() is used to perform the conversion from Unicode.</p>
<p>See also <a href="qstring.html#fromLocal8Bit">fromLocal8Bit</a>(), <a href="qstring.html#toAscii">toAscii</a>(), <a href="qstring.html#toLatin1">toLatin1</a>(), <a href="qstring.html#toUtf8">toUtf8</a>(), and <a href="qtextcodec.html">QTextCodec</a>.</p>
<h3 class="fn"><a name="toLong" />(long, bool <i>ok</i>) QString.toLong (<i>self</i>, int <i>base</i> = 10)</h3><p>Returns the string converted to a <tt>long</tt> using base <i>base</i>, which is 10 by default and must be between 2 and 36, or 0. Returns 0 if the conversion fails.</p>
<p>If <i>ok</i> is not 0: if a conversion error occurs, *<i>ok</i> is set to false; otherwise *<i>ok</i> is set to true.</p>
<p>If <i>base</i> is 0, the C language convention is used: If the string begins with "0x", base 16 is used; if the string begins with "0", base 8 is used; otherwise, base 10 is used.</p>
<p>Example:</p>
<pre>
QString str = "FF";
bool ok;
long hex = str.toLong(&ok, 16); // hex == 255, ok == true
long dec = str.toLong(&ok, 10); // dec == 0, ok == false
</pre>
<p>See also <a href="qstring.html#number">number</a>(), <a href="qstring.html#toULong">toULong</a>(), and <a href="qstring.html#toInt">toInt</a>().</p>
<h3 class="fn"><a name="toLongLong" />(long, bool <i>ok</i>) QString.toLongLong (<i>self</i>, int <i>base</i> = 10)</h3><p>Returns the string converted to a <tt>long long</tt> using base <i>base</i>, which is 10 by default and must be between 2 and 36, or 0. Returns 0 if the conversion fails.</p>
<p>If <i>ok</i> is not 0: if a conversion error occurs, *<i>ok</i> is set to false; otherwise *<i>ok</i> is set to true.</p>
<p>If <i>base</i> is 0, the C language convention is used: If the string begins with "0x", base 16 is used; if the string begins with "0", base 8 is used; otherwise, base 10 is used.</p>
<p>Example:</p>
<pre>
QString str = "FF";
bool ok;
long hex = str.toLongLong(&ok, 16); // hex == 255, ok == true
long dec = str.toLongLong(&ok, 10); // dec == 0, ok == false
</pre>
<p>See also <a href="qstring.html#number">number</a>(), <a href="qstring.html#toULongLong">toULongLong</a>(), and <a href="qstring.html#toInt">toInt</a>().</p>
<h3 class="fn"><a name="toLower" /><a href="qstring.html">QString</a> QString.toLower (<i>self</i>)</h3><p>Returns a lowercase copy of the string.</p>
<pre>
QString str = "TROlltECH";
str = str.toLower(); // str == "trolltech"
</pre>
<p>See also <a href="qstring.html#toUpper">toUpper</a>().</p>
<h3 class="fn"><a name="toShort" />(int, bool <i>ok</i>) QString.toShort (<i>self</i>, int <i>base</i> = 10)</h3><p>Returns the string converted to a <tt>short</tt> using base <i>base</i>, which is 10 by default and must be between 2 and 36, or 0. Returns 0 if the conversion fails.</p>
<p>If <i>ok</i> is not 0: if a conversion error occurs, *<i>ok</i> is set to false; otherwise *<i>ok</i> is set to true.</p>
<p>If <i>base</i> is 0, the C language convention is used: If the string begins with "0x", base 16 is used; if the string begins with "0", base 8 is used; otherwise, base 10 is used.</p>
<p>Example:</p>
<pre>
QString str = "FF";
bool ok;
short hex = str.toShort(&ok, 16); // hex == 255, ok == true
short dec = str.toShort(&ok, 10); // dec == 0, ok == false
</pre>
<p>See also <a href="qstring.html#number">number</a>(), <a href="qstring.html#toUShort">toUShort</a>(), and <a href="qstring.html#toInt">toInt</a>().</p>
<h3 class="fn"><a name="toUInt" />(unsigned long, bool <i>ok</i>) QString.toUInt (<i>self</i>, int <i>base</i> = 10)</h3><p>Returns the string converted to an <tt>unsigned int</tt> using base <i>base</i>, which is 10 by default and must be between 2 and 36, or 0. Returns 0 if the conversion fails.</p>
<p>If <i>ok</i> is not 0: if a conversion error occurs, *<i>ok</i> is set to false; otherwise *<i>ok</i> is set to true.</p>
<p>If <i>base</i> is 0, the C language convention is used: If the string begins with "0x", base 16 is used; if the string begins with "0", base 8 is used; otherwise, base 10 is used.</p>
<p>Example:</p>
<pre>
QString str = "FF";
bool ok;
uint hex = str.toUInt(&ok, 16); // hex == 255, ok == true
uint dec = str.toUInt(&ok, 10); // dec == 0, ok == false
</pre>
<p>See also <a href="qstring.html#number">number</a>() and <a href="qstring.html#toInt">toInt</a>().</p>
<h3 class="fn"><a name="toULong" />(unsigned long, bool <i>ok</i>) QString.toULong (<i>self</i>, int <i>base</i> = 10)</h3><p>Returns the string converted to an <tt>unsigned long</tt> using base <i>base</i>, which is 10 by default and must be between 2 and 36, or 0. Returns 0 if the conversion fails.</p>
<p>If <i>ok</i> is not 0: if a conversion error occurs, *<i>ok</i> is set to false; otherwise *<i>ok</i> is set to true.</p>
<p>If <i>base</i> is 0, the C language convention is used: If the string begins with "0x", base 16 is used; if the string begins with "0", base 8 is used; otherwise, base 10 is used.</p>
<p>Example:</p>
<pre>
QString str = "FF";
bool ok;
ulong hex = str.toULong(&ok, 16); // hex == 255, ok == true
ulong dec = str.toULong(&ok, 10); // dec == 0, ok == false
</pre>
<p>See also <a href="qstring.html#number">number</a>().</p>
<h3 class="fn"><a name="toULongLong" />(unsigned long, bool <i>ok</i>) QString.toULongLong (<i>self</i>, int <i>base</i> = 10)</h3><p>Returns the string converted to an <tt>unsigned long long</tt> using base <i>base</i>, which is 10 by default and must be between 2 and 36, or 0. Returns 0 if the conversion fails.</p>
<p>If <i>ok</i> is not 0: if a conversion error occurs, *<i>ok</i> is set to false; otherwise *<i>ok</i> is set to true.</p>
<p>If <i>base</i> is 0, the C language convention is used: If the string begins with "0x", base 16 is used; if the string begins with "0", base 8 is used; otherwise, base 10 is used.</p>
<p>Example:</p>
<pre>
QString str = "FF";
bool ok;
unsigned long hex = str.toULongLong(&ok, 16); // hex == 255, ok == true
unsigned long dec = str.toULongLong(&ok, 10); // dec == 0, ok == false
</pre>
<p>See also <a href="qstring.html#number">number</a>() and <a href="qstring.html#toLongLong">toLongLong</a>().</p>
<h3 class="fn"><a name="toUpper" /><a href="qstring.html">QString</a> QString.toUpper (<i>self</i>)</h3><p>Returns an uppercase copy of the string.</p>
<pre>
QString str = "TeXt";
str = str.toUpper(); // str == "TEXT"
</pre>
<p>See also <a href="qstring.html#toLower">toLower</a>().</p>
<h3 class="fn"><a name="toUShort" />(unsigned long, bool <i>ok</i>) QString.toUShort (<i>self</i>, int <i>base</i> = 10)</h3><p>Returns the string converted to an <tt>unsigned short</tt> using base <i>base</i>, which is 10 by default and must be between 2 and 36, or 0. Returns 0 if the conversion fails.</p>
<p>If <i>ok</i> is not 0: if a conversion error occurs, *<i>ok</i> is set to false; otherwise *<i>ok</i> is set to true.</p>
<p>If <i>base</i> is 0, the C language convention is used: If the string begins with "0x", base 16 is used; if the string begins with "0", base 8 is used; otherwise, base 10 is used.</p>
<p>Example:</p>
<pre>
QString str = "FF";
bool ok;
ushort hex = str.toUShort(&ok, 16); // hex == 255, ok == true
ushort dec = str.toUShort(&ok, 10); // dec == 0, ok == false
</pre>
<p>See also <a href="qstring.html#number">number</a>() and <a href="qstring.html#toShort">toShort</a>().</p>
<h3 class="fn"><a name="toUtf8" /><a href="qbytearray.html">QByteArray</a> QString.toUtf8 (<i>self</i>)</h3><p>Returns a UTF-8 representation of the string as a <a href="qbytearray.html">QByteArray</a>.</p>
<p>See also <a href="qstring.html#fromUtf8">fromUtf8</a>(), <a href="qstring.html#toAscii">toAscii</a>(), <a href="qstring.html#toLatin1">toLatin1</a>(), <a href="qstring.html#toLocal8Bit">toLocal8Bit</a>(), and <a href="qtextcodec.html">QTextCodec</a>.</p>
<h3 class="fn"><a name="trimmed" /><a href="qstring.html">QString</a> QString.trimmed (<i>self</i>)</h3><p>Returns a string that has whitespace removed from the start and the end.</p>
<p>Whitespace means any character for which <a href="qchar.html#isSpace">QChar.isSpace</a>() returns true. This includes the ASCII characters '\t', '\n', '\v', '\f', '\r', and ' '.</p>
<p>Example:</p>
<pre>
QString str = " lots\t of\nwhitespace\r\n ";
str = str.trimmed();
// str == "lots\t of\nwhitespace";
</pre>
<p>Unlike <a href="qstring.html#simplified">simplified</a>(), trimmed() leaves internal whitespace alone.</p>
<p>See also <a href="qstring.html#simplified">simplified</a>().</p>
<h3 class="fn"><a name="truncate" />QString.truncate (<i>self</i>, int <i>pos</i>)</h3><p>Truncates the string at index position <i>pos</i>.</p>
<p>If <i>pos</i> is beyond the end of the string, nothing happens.</p>
<p>Example:</p>
<pre>
QString str = "Vladivostok";
str.truncate(4);
// str == "Vlad"
</pre>
<p>See also <a href="qstring.html#chop">chop</a>(), <a href="qstring.html#resize">resize</a>(), and <a href="qstring.html#left">left</a>().</p>
<h3 class="fn"><a name="__add__" /><a href="qstring.html">QString</a> QString.__add__ (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>ba</i>)</h3><h3 class="fn"><a name="__add__-2" /><a href="qstring.html">QString</a> QString.__add__ (<i>self</i>, <a href="qchar.html">QChar</a> <i>s2</i>)</h3><h3 class="fn"><a name="__add__-3" /><a href="qstring.html">QString</a> QString.__add__ (<i>self</i>, <a href="qstring.html">QString</a> <i>s2</i>)</h3><h3 class="fn"><a name="__contains__" />int QString.__contains__ (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><h3 class="fn"><a name="__eq__" />bool QString.__eq__ (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><h3 class="fn"><a name="__eq__-2" />bool QString.__eq__ (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>)</h3><h3 class="fn"><a name="__eq__-3" />bool QString.__eq__ (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>s</i>)</h3><h3 class="fn"><a name="__ge__" />bool QString.__ge__ (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><h3 class="fn"><a name="__ge__-2" />bool QString.__ge__ (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>)</h3><h3 class="fn"><a name="__ge__-3" />bool QString.__ge__ (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>s</i>)</h3><h3 class="fn"><a name="__getitem__" /><a href="qstring.html">QString</a> QString.__getitem__ (<i>self</i>, int <i>i</i>)</h3><h3 class="fn"><a name="__getitem__-2" /><a href="qstring.html">QString</a> QString.__getitem__ (<i>self</i>, slice <i>slice</i>)</h3><h3 class="fn"><a name="__gt__" />bool QString.__gt__ (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><h3 class="fn"><a name="__gt__-2" />bool QString.__gt__ (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>)</h3><h3 class="fn"><a name="__gt__-3" />bool QString.__gt__ (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>s</i>)</h3><h3 class="fn"><a name="__hash__" />long QString.__hash__ (<i>self</i>)</h3><h3 class="fn"><a name="__iadd__" /><a href="qstring.html">QString</a> QString.__iadd__ (<i>self</i>, <a href="qchar.html">QChar</a> <i>c</i>)</h3><h3 class="fn"><a name="__iadd__-2" /><a href="qstring.html">QString</a> QString.__iadd__ (<i>self</i>, <a href="qchar.html#SpecialCharacter-enum">QChar.SpecialCharacter</a> <i>c</i>)</h3><h3 class="fn"><a name="__iadd__-3" /><a href="qstring.html">QString</a> QString.__iadd__ (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><h3 class="fn"><a name="__iadd__-4" /><a href="qstring.html">QString</a> QString.__iadd__ (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>)</h3><h3 class="fn"><a name="__iadd__-5" /><a href="qstring.html">QString</a> QString.__iadd__ (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>s</i>)</h3><h3 class="fn"><a name="__imul__" /><a href="qstring.html">QString</a> QString.__imul__ (<i>self</i>, int <i>m</i>)</h3><h3 class="fn"><a name="__le__" />bool QString.__le__ (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><h3 class="fn"><a name="__le__-2" />bool QString.__le__ (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>)</h3><h3 class="fn"><a name="__le__-3" />bool QString.__le__ (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>s</i>)</h3><h3 class="fn"><a name="__len__" />int QString.__len__ (<i>self</i>)</h3><h3 class="fn"><a name="__lt__" />bool QString.__lt__ (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><h3 class="fn"><a name="__lt__-2" />bool QString.__lt__ (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>)</h3><h3 class="fn"><a name="__lt__-3" />bool QString.__lt__ (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>s</i>)</h3><h3 class="fn"><a name="__mul__" /><a href="qstring.html">QString</a> QString.__mul__ (<i>self</i>, int <i>m</i>)</h3><h3 class="fn"><a name="__ne__" />bool QString.__ne__ (<i>self</i>, <a href="qstring.html">QString</a> <i>s</i>)</h3><h3 class="fn"><a name="__ne__-2" />bool QString.__ne__ (<i>self</i>, <a href="qlatin1string.html">QLatin1String</a> <i>s</i>)</h3><h3 class="fn"><a name="__ne__-3" />bool QString.__ne__ (<i>self</i>, <a href="qbytearray.html">QByteArray</a> <i>s</i>)</h3><h3 class="fn"><a name="__str__" />object QString.__str__ (<i>self</i>)</h3><h3 class="fn"><a name="__unicode__" />object QString.__unicode__ (<i>self</i>)</h3><address><hr /><div align="center"><table border="0" cellspacing="0" width="100%"><tr class="address"><td width="25%">PyQt 4.0.1 for X11</td><td align="center" width="50%">Copyright © <a href="http://www.riverbankcomputing.com">Riverbank Computing Ltd</a> and <a href="http://www.trolltech.com">Trolltech AS</a> 2006</td><td align="right" width="25%">Qt 4.1.4</td></tr></table></div></address></body></html>
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