238 lines
18 KiB
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238 lines
18 KiB
HTML
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<title>String Searching (Guile Reference Manual)</title>
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<div class="subsubsection-level-extent" id="String-Searching">
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Next: <a href="Alphabetic-Case-Mapping.html" accesskey="n" rel="next">Alphabetic Case Mapping</a>, Previous: <a href="String-Comparison.html" accesskey="p" rel="prev">String Comparison</a>, Up: <a href="Strings.html" accesskey="u" rel="up">Strings</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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<hr>
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<h4 class="subsubsection" id="String-Searching-1"><span>6.6.5.8 String Searching<a class="copiable-link" href="#String-Searching-1"> ¶</a></span></h4>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dindex"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-index</strong> <var class="def-var-arguments">s char_pred [start [end]]</var><a class="copiable-link" href="#index-string_002dindex"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005findex"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_index</strong> <var class="def-var-arguments">(s, char_pred, start, end)</var><a class="copiable-link" href="#index-scm_005fstring_005findex"> ¶</a></span></dt>
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<dd><p>Search through the string <var class="var">s</var> from left to right, returning
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the index of the first occurrence of a character which
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</p>
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<ul class="itemize mark-bullet">
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<li>equals <var class="var">char_pred</var>, if it is character,
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</li><li>satisfies the predicate <var class="var">char_pred</var>, if it is a procedure,
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</li><li>is in the set <var class="var">char_pred</var>, if it is a character set.
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</li></ul>
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<p>Return <code class="code">#f</code> if no match is found.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002drindex"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-rindex</strong> <var class="def-var-arguments">s char_pred [start [end]]</var><a class="copiable-link" href="#index-string_002drindex"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005frindex"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_rindex</strong> <var class="def-var-arguments">(s, char_pred, start, end)</var><a class="copiable-link" href="#index-scm_005fstring_005frindex"> ¶</a></span></dt>
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<dd><p>Search through the string <var class="var">s</var> from right to left, returning
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the index of the last occurrence of a character which
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</p>
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<ul class="itemize mark-bullet">
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<li>equals <var class="var">char_pred</var>, if it is character,
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</li><li>satisfies the predicate <var class="var">char_pred</var>, if it is a procedure,
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</li><li>is in the set if <var class="var">char_pred</var> is a character set.
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</li></ul>
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<p>Return <code class="code">#f</code> if no match is found.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dprefix_002dlength"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-prefix-length</strong> <var class="def-var-arguments">s1 s2 [start1 [end1 [start2 [end2]]]]</var><a class="copiable-link" href="#index-string_002dprefix_002dlength"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fprefix_005flength"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_prefix_length</strong> <var class="def-var-arguments">(s1, s2, start1, end1, start2, end2)</var><a class="copiable-link" href="#index-scm_005fstring_005fprefix_005flength"> ¶</a></span></dt>
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<dd><p>Return the length of the longest common prefix of the two
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strings.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dprefix_002dlength_002dci"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-prefix-length-ci</strong> <var class="def-var-arguments">s1 s2 [start1 [end1 [start2 [end2]]]]</var><a class="copiable-link" href="#index-string_002dprefix_002dlength_002dci"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fprefix_005flength_005fci"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_prefix_length_ci</strong> <var class="def-var-arguments">(s1, s2, start1, end1, start2, end2)</var><a class="copiable-link" href="#index-scm_005fstring_005fprefix_005flength_005fci"> ¶</a></span></dt>
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<dd><p>Return the length of the longest common prefix of the two
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strings, ignoring character case.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dsuffix_002dlength"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-suffix-length</strong> <var class="def-var-arguments">s1 s2 [start1 [end1 [start2 [end2]]]]</var><a class="copiable-link" href="#index-string_002dsuffix_002dlength"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fsuffix_005flength"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_suffix_length</strong> <var class="def-var-arguments">(s1, s2, start1, end1, start2, end2)</var><a class="copiable-link" href="#index-scm_005fstring_005fsuffix_005flength"> ¶</a></span></dt>
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<dd><p>Return the length of the longest common suffix of the two
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strings.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dsuffix_002dlength_002dci"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-suffix-length-ci</strong> <var class="def-var-arguments">s1 s2 [start1 [end1 [start2 [end2]]]]</var><a class="copiable-link" href="#index-string_002dsuffix_002dlength_002dci"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fsuffix_005flength_005fci"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_suffix_length_ci</strong> <var class="def-var-arguments">(s1, s2, start1, end1, start2, end2)</var><a class="copiable-link" href="#index-scm_005fstring_005fsuffix_005flength_005fci"> ¶</a></span></dt>
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<dd><p>Return the length of the longest common suffix of the two
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strings, ignoring character case.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dprefix_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-prefix?</strong> <var class="def-var-arguments">s1 s2 [start1 [end1 [start2 [end2]]]]</var><a class="copiable-link" href="#index-string_002dprefix_003f"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fprefix_005fp"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_prefix_p</strong> <var class="def-var-arguments">(s1, s2, start1, end1, start2, end2)</var><a class="copiable-link" href="#index-scm_005fstring_005fprefix_005fp"> ¶</a></span></dt>
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<dd><p>Is <var class="var">s1</var> a prefix of <var class="var">s2</var>?
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dprefix_002dci_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-prefix-ci?</strong> <var class="def-var-arguments">s1 s2 [start1 [end1 [start2 [end2]]]]</var><a class="copiable-link" href="#index-string_002dprefix_002dci_003f"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fprefix_005fci_005fp"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_prefix_ci_p</strong> <var class="def-var-arguments">(s1, s2, start1, end1, start2, end2)</var><a class="copiable-link" href="#index-scm_005fstring_005fprefix_005fci_005fp"> ¶</a></span></dt>
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<dd><p>Is <var class="var">s1</var> a prefix of <var class="var">s2</var>, ignoring character case?
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dsuffix_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-suffix?</strong> <var class="def-var-arguments">s1 s2 [start1 [end1 [start2 [end2]]]]</var><a class="copiable-link" href="#index-string_002dsuffix_003f"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fsuffix_005fp"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_suffix_p</strong> <var class="def-var-arguments">(s1, s2, start1, end1, start2, end2)</var><a class="copiable-link" href="#index-scm_005fstring_005fsuffix_005fp"> ¶</a></span></dt>
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<dd><p>Is <var class="var">s1</var> a suffix of <var class="var">s2</var>?
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dsuffix_002dci_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-suffix-ci?</strong> <var class="def-var-arguments">s1 s2 [start1 [end1 [start2 [end2]]]]</var><a class="copiable-link" href="#index-string_002dsuffix_002dci_003f"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fsuffix_005fci_005fp"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_suffix_ci_p</strong> <var class="def-var-arguments">(s1, s2, start1, end1, start2, end2)</var><a class="copiable-link" href="#index-scm_005fstring_005fsuffix_005fci_005fp"> ¶</a></span></dt>
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<dd><p>Is <var class="var">s1</var> a suffix of <var class="var">s2</var>, ignoring character case?
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dindex_002dright"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-index-right</strong> <var class="def-var-arguments">s char_pred [start [end]]</var><a class="copiable-link" href="#index-string_002dindex_002dright"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005findex_005fright"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_index_right</strong> <var class="def-var-arguments">(s, char_pred, start, end)</var><a class="copiable-link" href="#index-scm_005fstring_005findex_005fright"> ¶</a></span></dt>
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<dd><p>Search through the string <var class="var">s</var> from right to left, returning
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the index of the last occurrence of a character which
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</p>
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<ul class="itemize mark-bullet">
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<li>equals <var class="var">char_pred</var>, if it is character,
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</li><li>satisfies the predicate <var class="var">char_pred</var>, if it is a procedure,
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</li><li>is in the set if <var class="var">char_pred</var> is a character set.
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</li></ul>
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<p>Return <code class="code">#f</code> if no match is found.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dskip"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-skip</strong> <var class="def-var-arguments">s char_pred [start [end]]</var><a class="copiable-link" href="#index-string_002dskip"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fskip"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_skip</strong> <var class="def-var-arguments">(s, char_pred, start, end)</var><a class="copiable-link" href="#index-scm_005fstring_005fskip"> ¶</a></span></dt>
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<dd><p>Search through the string <var class="var">s</var> from left to right, returning
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the index of the first occurrence of a character which
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</p>
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<ul class="itemize mark-bullet">
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<li>does not equal <var class="var">char_pred</var>, if it is character,
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</li><li>does not satisfy the predicate <var class="var">char_pred</var>, if it is a
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procedure,
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</li><li>is not in the set if <var class="var">char_pred</var> is a character set.
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</li></ul>
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</dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dskip_002dright"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-skip-right</strong> <var class="def-var-arguments">s char_pred [start [end]]</var><a class="copiable-link" href="#index-string_002dskip_002dright"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fskip_005fright"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_skip_right</strong> <var class="def-var-arguments">(s, char_pred, start, end)</var><a class="copiable-link" href="#index-scm_005fstring_005fskip_005fright"> ¶</a></span></dt>
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<dd><p>Search through the string <var class="var">s</var> from right to left, returning
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the index of the last occurrence of a character which
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</p>
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<ul class="itemize mark-bullet">
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<li>does not equal <var class="var">char_pred</var>, if it is character,
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</li><li>does not satisfy the predicate <var class="var">char_pred</var>, if it is a
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procedure,
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</li><li>is not in the set if <var class="var">char_pred</var> is a character set.
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</li></ul>
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</dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dcount"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-count</strong> <var class="def-var-arguments">s char_pred [start [end]]</var><a class="copiable-link" href="#index-string_002dcount"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fcount"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_count</strong> <var class="def-var-arguments">(s, char_pred, start, end)</var><a class="copiable-link" href="#index-scm_005fstring_005fcount"> ¶</a></span></dt>
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<dd><p>Return the count of the number of characters in the string
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<var class="var">s</var> which
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</p>
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<ul class="itemize mark-bullet">
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<li>equals <var class="var">char_pred</var>, if it is character,
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</li><li>satisfies the predicate <var class="var">char_pred</var>, if it is a procedure.
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</li><li>is in the set <var class="var">char_pred</var>, if it is a character set.
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</li></ul>
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</dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dcontains"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-contains</strong> <var class="def-var-arguments">s1 s2 [start1 [end1 [start2 [end2]]]]</var><a class="copiable-link" href="#index-string_002dcontains"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fcontains"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_contains</strong> <var class="def-var-arguments">(s1, s2, start1, end1, start2, end2)</var><a class="copiable-link" href="#index-scm_005fstring_005fcontains"> ¶</a></span></dt>
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<dd><p>Does string <var class="var">s1</var> contain string <var class="var">s2</var>? Return the index
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in <var class="var">s1</var> where <var class="var">s2</var> occurs as a substring, or false.
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The optional start/end indices restrict the operation to the
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indicated substrings.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-string_002dcontains_002dci"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-contains-ci</strong> <var class="def-var-arguments">s1 s2 [start1 [end1 [start2 [end2]]]]</var><a class="copiable-link" href="#index-string_002dcontains_002dci"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-scm_005fstring_005fcontains_005fci"><span class="category-def">C Function: </span><span><strong class="def-name">scm_string_contains_ci</strong> <var class="def-var-arguments">(s1, s2, start1, end1, start2, end2)</var><a class="copiable-link" href="#index-scm_005fstring_005fcontains_005fci"> ¶</a></span></dt>
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<dd><p>Does string <var class="var">s1</var> contain string <var class="var">s2</var>? Return the index
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in <var class="var">s1</var> where <var class="var">s2</var> occurs as a substring, or false.
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The optional start/end indices restrict the operation to the
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indicated substrings. Character comparison is done
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case-insensitively.
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</p></dd></dl>
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</div>
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<hr>
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<p>
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Next: <a href="Alphabetic-Case-Mapping.html">Alphabetic Case Mapping</a>, Previous: <a href="String-Comparison.html">String Comparison</a>, Up: <a href="Strings.html">Strings</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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