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<RefEntry id="length-string-unit-part">
<!-- This file is generated automatically from the DSSSL source. -->
<!-- Do not edit this file! -->
<?html-filename length-string-unit-part.html>
<RefMeta>
<RefEntryTitle>length-string-unit-part</RefEntryTitle>
<RefMiscInfo Role="file">dblib.dsl</RefMiscInfo>
</RefMeta>
<RefNameDiv>
<RefName>length-string-unit-part</RefName>
<RefPurpose>Returns the unit part of a length string</RefPurpose>
</RefNameDiv>
<RefSynopsisDiv><Title>Synopsis</Title>
<Synopsis>
(length-string-unit-part lenstr)
</Synopsis>
</RefSynopsisDiv>
<RefSect1><Title>Description</Title>
<para>
Given a length as a string, return the units part.</para>
</RefSect1>
<RefSect1><Title>Example</Title>
<para>
<literal>"100pt"</literal> returns <literal>"pt"</literal>. <literal>"30"</literal> returns <literal>""</literal>.
<literal>"in"</literal> returns <literal>"in"</literal>.
</para>
</RefSect1>
<RefSect1><Title>Author</Title>
<para>
Norman Walsh, <ndw@nwalsh.com>
</para>
</RefSect1>
<RefSect1><Title>Source Code</Title>
<ProgramListing>
(define (length-string-unit-part lenstr)
;; Returns the unit part of a length string
(let ((number-part (length-string-number-part lenstr))
(strlen (string-length lenstr)))
(if (equal? (string-length number-part) strlen)
""
(substring lenstr (string-length number-part) strlen))))
</ProgramListing>
</RefSect1>
</RefEntry>
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