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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<reference xml:id="class.ds-vector" role="class" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
<title>The Vector class</title>
<titleabbrev>Ds\Vector</titleabbrev>
<partintro>
<!-- {{{ Ds\Vector intro -->
<section xml:id="ds-vector.intro">
&reftitle.intro;
<para>
A Vector is a sequence of values in a contiguous buffer that grows and
shrinks automatically. It’s the most efficient sequential structure because
a value’s index is a direct mapping to its index in the buffer, and the
growth factor isn't bound to a specific multiple or exponent.
</para>
</section>
<!-- }}} -->
<section xml:id="ds-vector.strengths">
<title xmlns="http://docbook.org/ns/docbook">Strengths</title>
<para>
<simplelist>
<member>Supports array syntax (square brackets).</member>
<member>Uses less overall memory than an &array; for the same number of values.</member>
<member>Automatically frees allocated memory when its size drops low enough.</member>
<member>Capacity does not have to be a power of 2.</member>
<member>
<function>get</function>,
<function>set</function>,
<function>push</function>,
<function>pop</function> are all O(1).
</member>
</simplelist>
</para>
</section>
<section xml:id="ds-vector.weaknesses">
<title xmlns="http://docbook.org/ns/docbook">Weaknesses</title>
<para>
<simplelist>
<member>
<function>shift</function>,
<function>unshift</function>,
<function>insert</function> and
<function>remove</function> are all O(n).
</member>
</simplelist>
</para>
</section>
<section xml:id="ds-vector.synopsis">
&reftitle.classsynopsis;
<!-- {{{ Synopsis -->
<classsynopsis>
<ooclass>
<classname>Ds\Vector</classname>
</ooclass>
<!-- {{{ Class synopsis -->
<classsynopsisinfo>
<ooclass><classname>Ds\Vector</classname></ooclass>
<oointerface><interfacename>Ds\Sequence</interfacename></oointerface>
<oointerface><interfacename>ArrayAccess</interfacename></oointerface>
</classsynopsisinfo>
<!-- }}} -->
<classsynopsisinfo role="comment">&Constants;</classsynopsisinfo>
<fieldsynopsis>
<modifier>const</modifier>
<type>int</type>
<varname linkend="ds-vector.constants.min-capacity">Ds\Vector::MIN_CAPACITY</varname>
<initializer>10</initializer>
</fieldsynopsis>
<classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.ds-vector')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis)">
<xi:fallback/>
</xi:include>
</classsynopsis>
<!-- }}} -->
</section>
<!-- {{{ Ds\Vector constants -->
<section xml:id="ds-vector.constants">
&reftitle.constants;
<variablelist>
<varlistentry xml:id="ds-vector.constants.min-capacity">
<term><constant>Ds\Vector::MIN_CAPACITY</constant></term>
<listitem>
<para></para>
</listitem>
</varlistentry>
</variablelist>
</section>
<!-- }}} -->
<section role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>PECL ds 1.3.0</entry>
<entry>
The class now implements <classname>ArrayAccess</classname>.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</section>
</partintro>
&reference.ds.ds.entities.vector;
</reference>
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