548 lines
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548 lines
65 KiB
HTML
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Copyright (C) 2021 Maxime Devos
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Copyright (C) 2024 Tomas Volf
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<title>rnrs base (Guile Reference Manual)</title>
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Next: <a href="rnrs-unicode.html" accesskey="n" rel="next">rnrs unicode</a>, Previous: <a href="Library-Usage.html" accesskey="p" rel="prev">Library Usage</a>, Up: <a href="R6RS-Standard-Libraries.html" accesskey="u" rel="up">R6RS Standard Libraries</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="rnrs-base-1"><span>7.6.2.2 rnrs base<a class="copiable-link" href="#rnrs-base-1"> ¶</a></span></h4>
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<p>The <code class="code">(rnrs base (6))</code> library exports the procedures and syntactic
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forms described in the main section of the Report
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(see <a data-manual="r6rs" href="../r6rs_html/Base-library.html#Base-library">R6RS Base library</a> in <cite class="cite">The Revised^6 Report on the Algorithmic Language Scheme</cite>). They are
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grouped below by the existing manual sections to which they correspond.
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</p>
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<dl class="first-deffn">
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<dt class="deffn" id="index-boolean_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">boolean?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-boolean_003f-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-not-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">not</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-not-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Booleans.html">Booleans</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-symbol_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">symbol?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-symbol_003f-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-symbol_002d_003estring-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">symbol->string</strong> <var class="def-var-arguments">sym</var><a class="copiable-link" href="#index-symbol_002d_003estring-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-string_002d_003esymbol-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string->symbol</strong> <var class="def-var-arguments">str</var><a class="copiable-link" href="#index-string_002d_003esymbol-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Symbol-Primitives.html">Operations Related to Symbols</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-char_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-char_003f-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-char_003d_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char=?</strong><a class="copiable-link" href="#index-char_003d_003f-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-char_003c_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char<?</strong><a class="copiable-link" href="#index-char_003c_003f-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-char_003e_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char>?</strong><a class="copiable-link" href="#index-char_003e_003f-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-char_003c_003d_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char<=?</strong><a class="copiable-link" href="#index-char_003c_003d_003f-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-char_003e_003d_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char>=?</strong><a class="copiable-link" href="#index-char_003e_003d_003f-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-integer_002d_003echar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">integer->char</strong> <var class="def-var-arguments">n</var><a class="copiable-link" href="#index-integer_002d_003echar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-char_002d_003einteger-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">char->integer</strong> <var class="def-var-arguments">chr</var><a class="copiable-link" href="#index-char_002d_003einteger-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Characters.html">Characters</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-list_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">list?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-list_003f-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-null_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">null?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-null_003f-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="List-Predicates.html">List Predicates</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-pair_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">pair?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-pair_003f-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cons-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cons</strong> <var class="def-var-arguments">x y</var><a class="copiable-link" href="#index-cons-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-car-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">car</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-car-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cdr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cdr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cdr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-caar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">caar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-caar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cadr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cadr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cadr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cdar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cdar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cdar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cddr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cddr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cddr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-caaar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">caaar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-caaar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-caadr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">caadr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-caadr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cadar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cadar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cadar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cdaar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cdaar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cdaar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-caddr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">caddr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-caddr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cdadr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cdadr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cdadr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cddar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cddar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cddar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cdddr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cdddr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cdddr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-caaaar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">caaaar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-caaaar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-caaadr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">caaadr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-caaadr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-caadar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">caadar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-caadar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cadaar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cadaar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cadaar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cdaaar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cdaaar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cdaaar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cddaar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cddaar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cddaar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cdadar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cdadar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cdadar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cdaadr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cdaadr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cdaadr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cadadr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cadadr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cadadr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-caaddr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">caaddr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-caaddr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-caddar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">caddar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-caddar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cadddr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cadddr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cadddr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cdaddr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cdaddr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cdaddr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cddadr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cddadr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cddadr-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cdddar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cdddar</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cdddar-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-cddddr-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cddddr</strong> <var class="def-var-arguments">pair</var><a class="copiable-link" href="#index-cddddr-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Pairs.html">Pairs</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-number_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">number?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-number_003f-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Numerical-Tower.html">Scheme’s Numerical “Tower”</a>, for documentation.
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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_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-string_003f-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="String-Predicates.html">String Predicates</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-procedure_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">procedure?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-procedure_003f-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Procedure-Properties.html">Procedure Properties and Meta-information</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-define-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">define</strong> <var class="def-var-arguments">name value</var><a class="copiable-link" href="#index-define-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-set_0021"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">set!</strong> <var class="def-var-arguments">variable-name value</var><a class="copiable-link" href="#index-set_0021"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Definition.html">Defining and Setting Variables</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-define_002dsyntax-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">define-syntax</strong> <var class="def-var-arguments">keyword expression</var><a class="copiable-link" href="#index-define_002dsyntax-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-let_002dsyntax-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">let-syntax</strong> <var class="def-var-arguments">((keyword transformer) …) exp1 exp2 …</var><a class="copiable-link" href="#index-let_002dsyntax-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-letrec_002dsyntax-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">letrec-syntax</strong> <var class="def-var-arguments">((keyword transformer) …) exp1 exp2 …</var><a class="copiable-link" href="#index-letrec_002dsyntax-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Defining-Macros.html">Defining Macros</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-identifier_002dsyntax-2"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">identifier-syntax</strong> <var class="def-var-arguments">exp</var><a class="copiable-link" href="#index-identifier_002dsyntax-2"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Identifier-Macros.html">Identifier Macros</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-syntax_002drules-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">syntax-rules</strong> <var class="def-var-arguments">literals (pattern template) ...</var><a class="copiable-link" href="#index-syntax_002drules-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Syntax-Rules.html">Syntax-rules Macros</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-lambda-2"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">lambda</strong> <var class="def-var-arguments">formals body</var><a class="copiable-link" href="#index-lambda-2"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Lambda.html">Lambda: Basic Procedure Creation</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-let-2"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">let</strong> <var class="def-var-arguments">bindings body</var><a class="copiable-link" href="#index-let-2"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-let_002a-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">let*</strong> <var class="def-var-arguments">bindings body</var><a class="copiable-link" href="#index-let_002a-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-letrec-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">letrec</strong> <var class="def-var-arguments">bindings body</var><a class="copiable-link" href="#index-letrec-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-letrec_002a-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">letrec*</strong> <var class="def-var-arguments">bindings body</var><a class="copiable-link" href="#index-letrec_002a-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Local-Bindings.html">Local Variable Bindings</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-let_002dvalues-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">let-values</strong> <var class="def-var-arguments">bindings body</var><a class="copiable-link" href="#index-let_002dvalues-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-let_002a_002dvalues-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">let*-values</strong> <var class="def-var-arguments">bindings body</var><a class="copiable-link" href="#index-let_002a_002dvalues-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="SRFI_002d11.html">SRFI-11 - let-values</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-begin-2"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">begin</strong> <var class="def-var-arguments">expr1 expr2 ...</var><a class="copiable-link" href="#index-begin-2"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="begin.html">Sequencing and Splicing</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-quote-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">quote</strong> <var class="def-var-arguments">expr</var><a class="copiable-link" href="#index-quote-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-quasiquote-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">quasiquote</strong> <var class="def-var-arguments">expr</var><a class="copiable-link" href="#index-quasiquote-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-unquote-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">unquote</strong> <var class="def-var-arguments">expr</var><a class="copiable-link" href="#index-unquote-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-unquote_002dsplicing-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">unquote-splicing</strong> <var class="def-var-arguments">expr</var><a class="copiable-link" href="#index-unquote_002dsplicing-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Expression-Syntax.html">Expression Syntax</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-if-2"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">if</strong> <var class="def-var-arguments">test consequence [alternate]</var><a class="copiable-link" href="#index-if-2"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-cond-2"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">cond</strong> <var class="def-var-arguments">clause1 clause2 ...</var><a class="copiable-link" href="#index-cond-2"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-case-2"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">case</strong> <var class="def-var-arguments">key clause1 clause2 ...</var><a class="copiable-link" href="#index-case-2"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Conditionals.html">Simple Conditional Evaluation</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-and-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">and</strong> <var class="def-var-arguments">expr ...</var><a class="copiable-link" href="#index-and-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-or-1"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">or</strong> <var class="def-var-arguments">expr ...</var><a class="copiable-link" href="#index-or-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="and-or.html">Conditional Evaluation of a Sequence of Expressions</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-eq_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">eq?</strong> <var class="def-var-arguments">x y</var><a class="copiable-link" href="#index-eq_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-eqv_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">eqv?</strong> <var class="def-var-arguments">x y</var><a class="copiable-link" href="#index-eqv_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-equal_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">equal?</strong> <var class="def-var-arguments">x y</var><a class="copiable-link" href="#index-equal_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-symbol_003d_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">symbol=?</strong> <var class="def-var-arguments">symbol1 symbol2 ...</var><a class="copiable-link" href="#index-symbol_003d_003f"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Equality.html">Equality</a>, for documentation.
|
|
</p>
|
|
<p><code class="code">symbol=?</code> is identical to <code class="code">eq?</code>.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-complex_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">complex?</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-complex_003f-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Complex-Numbers.html">Complex Numbers</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-real_002dpart-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">real-part</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-real_002dpart-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-imag_002dpart-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">imag-part</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-imag_002dpart-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-make_002drectangular-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">make-rectangular</strong> <var class="def-var-arguments">real_part imaginary_part</var><a class="copiable-link" href="#index-make_002drectangular-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-make_002dpolar-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">make-polar</strong> <var class="def-var-arguments">x y</var><a class="copiable-link" href="#index-make_002dpolar-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-magnitude-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">magnitude</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-magnitude-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-angle-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">angle</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-angle-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Complex.html">Complex Number Operations</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-sqrt-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">sqrt</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-sqrt-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-exp-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">exp</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-exp-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-expt-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">expt</strong> <var class="def-var-arguments">z1 z2</var><a class="copiable-link" href="#index-expt-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-log-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">log</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-log-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-sin-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">sin</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-sin-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-cos-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">cos</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-cos-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-tan-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">tan</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-tan-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-asin-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">asin</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-asin-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-acos-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">acos</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-acos-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-atan-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">atan</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-atan-2"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Scientific.html">Scientific Functions</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-real_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">real?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-real_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-rational_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">rational?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-rational_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-numerator-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">numerator</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-numerator-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-denominator-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">denominator</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-denominator-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-rationalize-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">rationalize</strong> <var class="def-var-arguments">x eps</var><a class="copiable-link" href="#index-rationalize-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Reals-and-Rationals.html">Real and Rational Numbers</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-exact_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">exact?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-exact_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-inexact_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">inexact?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-inexact_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-exact"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">exact</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-exact"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-inexact"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">inexact</strong> <var class="def-var-arguments">z</var><a class="copiable-link" href="#index-inexact"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Exactness.html">Exact and Inexact Numbers</a>, for documentation. The <code class="code">exact</code> and
|
|
<code class="code">inexact</code> procedures are identical to the <code class="code">inexact->exact</code> and
|
|
<code class="code">exact->inexact</code> procedures provided by Guile’s code library.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-integer_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">integer?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-integer_003f-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Integers.html">Integers</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-odd_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">odd?</strong> <var class="def-var-arguments">n</var><a class="copiable-link" href="#index-odd_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-even_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">even?</strong> <var class="def-var-arguments">n</var><a class="copiable-link" href="#index-even_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-gcd-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">gcd</strong> <var class="def-var-arguments">x ...</var><a class="copiable-link" href="#index-gcd-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-lcm-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">lcm</strong> <var class="def-var-arguments">x ...</var><a class="copiable-link" href="#index-lcm-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-exact_002dinteger_002dsqrt-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">exact-integer-sqrt</strong> <var class="def-var-arguments">k</var><a class="copiable-link" href="#index-exact_002dinteger_002dsqrt-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Integer-Operations.html">Operations on Integer Values</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-_003d-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">=</strong><a class="copiable-link" href="#index-_003d-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-_003c-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name"><</strong><a class="copiable-link" href="#index-_003c-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-_003e-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">></strong><a class="copiable-link" href="#index-_003e-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-_003c_003d-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name"><=</strong><a class="copiable-link" href="#index-_003c_003d-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-_003e_003d-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">>=</strong><a class="copiable-link" href="#index-_003e_003d-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-zero_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">zero?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-zero_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-positive_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">positive?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-positive_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-negative_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">negative?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-negative_003f-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Comparison.html">Comparison Predicates</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-for_002deach-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">for-each</strong> <var class="def-var-arguments">f lst1 lst2 ...</var><a class="copiable-link" href="#index-for_002deach-2"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="SRFI_002d1-Fold-and-Map.html">Fold, Unfold & Map</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-list-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">list</strong> <var class="def-var-arguments">elem …</var><a class="copiable-link" href="#index-list-2"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="List-Constructors.html">List Constructors</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-length-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">length</strong> <var class="def-var-arguments">lst</var><a class="copiable-link" href="#index-length-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-list_002dref-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">list-ref</strong> <var class="def-var-arguments">lst k</var><a class="copiable-link" href="#index-list_002dref-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-list_002dtail-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">list-tail</strong> <var class="def-var-arguments">lst k</var><a class="copiable-link" href="#index-list_002dtail-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="List-Selection.html">List Selection</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-append-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">append</strong> <var class="def-var-arguments">lst … obj</var><a class="copiable-link" href="#index-append-2"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-append-3"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">append</strong><a class="copiable-link" href="#index-append-3"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-reverse-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">reverse</strong> <var class="def-var-arguments">lst</var><a class="copiable-link" href="#index-reverse-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Append_002fReverse.html">Append and Reverse</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-number_002d_003estring-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">number->string</strong> <var class="def-var-arguments">n [radix]</var><a class="copiable-link" href="#index-number_002d_003estring-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-string_002d_003enumber-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string->number</strong> <var class="def-var-arguments">str [radix]</var><a class="copiable-link" href="#index-string_002d_003enumber-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Conversion.html">Converting Numbers To and From Strings</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-string-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string</strong> <var class="def-var-arguments">char ...</var><a class="copiable-link" href="#index-string-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-make_002dstring-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">make-string</strong> <var class="def-var-arguments">k [chr]</var><a class="copiable-link" href="#index-make_002dstring-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-list_002d_003estring-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">list->string</strong> <var class="def-var-arguments">lst</var><a class="copiable-link" href="#index-list_002d_003estring-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="String-Constructors.html">String Constructors</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-string_002d_003elist-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string->list</strong> <var class="def-var-arguments">str [start [end]]</var><a class="copiable-link" href="#index-string_002d_003elist-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="List_002fString-Conversion.html">List/String conversion</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-string_002dlength-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-length</strong> <var class="def-var-arguments">str</var><a class="copiable-link" href="#index-string_002dlength-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-string_002dref-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-ref</strong> <var class="def-var-arguments">str k</var><a class="copiable-link" href="#index-string_002dref-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-string_002dcopy-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-copy</strong> <var class="def-var-arguments">str [start [end]]</var><a class="copiable-link" href="#index-string_002dcopy-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-substring-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">substring</strong> <var class="def-var-arguments">str start [end]</var><a class="copiable-link" href="#index-substring-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="String-Selection.html">String Selection</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-string_003d_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string=?</strong> <var class="def-var-arguments">s1 s2 s3 …</var><a class="copiable-link" href="#index-string_003d_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-string_003c_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string<?</strong> <var class="def-var-arguments">s1 s2 s3 …</var><a class="copiable-link" href="#index-string_003c_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-string_003e_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string>?</strong> <var class="def-var-arguments">s1 s2 s3 …</var><a class="copiable-link" href="#index-string_003e_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-string_003c_003d_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string<=?</strong> <var class="def-var-arguments">s1 s2 s3 …</var><a class="copiable-link" href="#index-string_003c_003d_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-string_003e_003d_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string>=?</strong> <var class="def-var-arguments">s1 s2 s3 …</var><a class="copiable-link" href="#index-string_003e_003d_003f-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="String-Comparison.html">String Comparison</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-string_002dappend-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-append</strong> <var class="def-var-arguments">arg …</var><a class="copiable-link" href="#index-string_002dappend-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Reversing-and-Appending-Strings.html">Reversing and Appending Strings</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-string_002dfor_002deach-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">string-for-each</strong> <var class="def-var-arguments">proc s [start [end]]</var><a class="copiable-link" href="#index-string_002dfor_002deach-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Mapping-Folding-and-Unfolding.html">Mapping, Folding, and Unfolding</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-_002b-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">+</strong> <var class="def-var-arguments">z1 ...</var><a class="copiable-link" href="#index-_002b-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-_002d-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">-</strong> <var class="def-var-arguments">z1 z2 ...</var><a class="copiable-link" href="#index-_002d-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-_002a-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">*</strong> <var class="def-var-arguments">z1 ...</var><a class="copiable-link" href="#index-_002a-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-_002f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">/</strong> <var class="def-var-arguments">z1 z2 ...</var><a class="copiable-link" href="#index-_002f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-max-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">max</strong> <var class="def-var-arguments">x1 x2 ...</var><a class="copiable-link" href="#index-max-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-min-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">min</strong> <var class="def-var-arguments">x1 x2 ...</var><a class="copiable-link" href="#index-min-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-abs-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">abs</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-abs-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-truncate-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">truncate</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-truncate-2"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-floor-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">floor</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-floor-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-ceiling-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">ceiling</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-ceiling-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-round-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">round</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-round-1"> ¶</a></span></dt>
|
|
<dd><p>See <a class="xref" href="Arithmetic.html">Arithmetic Functions</a>, for documentation.
|
|
</p></dd></dl>
|
|
|
|
<a class="index-entry-id" id="index-div-2"></a>
|
|
<a class="index-entry-id" id="index-mod-2"></a>
|
|
<a class="index-entry-id" id="index-div_002dand_002dmod-1"></a>
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-div"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">div</strong> <var class="def-var-arguments">x y</var><a class="copiable-link" href="#index-div"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-mod"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">mod</strong> <var class="def-var-arguments">x y</var><a class="copiable-link" href="#index-mod"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-div_002dand_002dmod"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">div-and-mod</strong> <var class="def-var-arguments">x y</var><a class="copiable-link" href="#index-div_002dand_002dmod"> ¶</a></span></dt>
|
|
<dd><p>These procedures accept two real numbers <var class="var">x</var> and <var class="var">y</var>, where the
|
|
divisor <var class="var">y</var> must be non-zero. <code class="code">div</code> returns the integer <var class="var">q</var>
|
|
and <code class="code">mod</code> returns the real number <var class="var">r</var> such that
|
|
<em class="math"><var class="var">x</var> = <var class="var">q</var>*<var class="var">y</var> + <var class="var">r</var></em> and <em class="math">0 <= <var class="var">r</var> < abs(<var class="var">y</var>)</em>.
|
|
<code class="code">div-and-mod</code> returns both <var class="var">q</var> and <var class="var">r</var>, and is more
|
|
efficient than computing each separately. Note that when <em class="math"><var class="var">y</var> > 0</em>,
|
|
<code class="code">div</code> returns <em class="math">floor(<var class="var">x</var>/<var class="var">y</var>)</em>, otherwise
|
|
it returns <em class="math">ceiling(<var class="var">x</var>/<var class="var">y</var>)</em>.
|
|
</p>
|
|
<div class="example lisp">
|
|
<pre class="lisp-preformatted">(div 123 10) ⇒ 12
|
|
(mod 123 10) ⇒ 3
|
|
(div-and-mod 123 10) ⇒ 12 and 3
|
|
(div-and-mod 123 -10) ⇒ -12 and 3
|
|
(div-and-mod -123 10) ⇒ -13 and 7
|
|
(div-and-mod -123 -10) ⇒ 13 and 7
|
|
(div-and-mod -123.2 -63.5) ⇒ 2.0 and 3.8
|
|
(div-and-mod 16/3 -10/7) ⇒ -3 and 22/21
|
|
</pre></div>
|
|
</dd></dl>
|
|
|
|
<a class="index-entry-id" id="index-div0-1"></a>
|
|
<a class="index-entry-id" id="index-mod0-1"></a>
|
|
<a class="index-entry-id" id="index-div0_002dand_002dmod0-1"></a>
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-div0"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">div0</strong> <var class="def-var-arguments">x y</var><a class="copiable-link" href="#index-div0"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-mod0"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">mod0</strong> <var class="def-var-arguments">x y</var><a class="copiable-link" href="#index-mod0"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-div0_002dand_002dmod0"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">div0-and-mod0</strong> <var class="def-var-arguments">x y</var><a class="copiable-link" href="#index-div0_002dand_002dmod0"> ¶</a></span></dt>
|
|
<dd><p>These procedures accept two real numbers <var class="var">x</var> and <var class="var">y</var>, where the
|
|
divisor <var class="var">y</var> must be non-zero. <code class="code">div0</code> returns the
|
|
integer <var class="var">q</var> and <code class="code">mod0</code> returns the real number
|
|
<var class="var">r</var> such that <em class="math"><var class="var">x</var> = <var class="var">q</var>*<var class="var">y</var> + <var class="var">r</var></em> and
|
|
<em class="math">-abs(<var class="var">y</var>/2) <= <var class="var">r</var> < abs(<var class="var">y</var>/2)</em>. <code class="code">div0-and-mod0</code>
|
|
returns both <var class="var">q</var> and <var class="var">r</var>, and is more efficient than computing
|
|
each separately.
|
|
</p>
|
|
<p>Note that <code class="code">div0</code> returns <em class="math"><var class="var">x</var>/<var class="var">y</var></em> rounded to the
|
|
nearest integer. When <em class="math"><var class="var">x</var>/<var class="var">y</var></em> lies exactly half-way
|
|
between two integers, the tie is broken according to the sign of
|
|
<var class="var">y</var>. If <em class="math"><var class="var">y</var> > 0</em>, ties are rounded toward positive
|
|
infinity, otherwise they are rounded toward negative infinity.
|
|
This is a consequence of the requirement that
|
|
<em class="math">-abs(<var class="var">y</var>/2) <= <var class="var">r</var> < abs(<var class="var">y</var>/2)</em>.
|
|
</p>
|
|
<div class="example lisp">
|
|
<pre class="lisp-preformatted">(div0 123 10) ⇒ 12
|
|
(mod0 123 10) ⇒ 3
|
|
(div0-and-mod0 123 10) ⇒ 12 and 3
|
|
(div0-and-mod0 123 -10) ⇒ -12 and 3
|
|
(div0-and-mod0 -123 10) ⇒ -12 and -3
|
|
(div0-and-mod0 -123 -10) ⇒ 12 and -3
|
|
(div0-and-mod0 -123.2 -63.5) ⇒ 2.0 and 3.8
|
|
(div0-and-mod0 16/3 -10/7) ⇒ -4 and -8/21
|
|
</pre></div>
|
|
</dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-real_002dvalued_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">real-valued?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-real_002dvalued_003f"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-rational_002dvalued_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">rational-valued?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-rational_002dvalued_003f"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-integer_002dvalued_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">integer-valued?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-integer_002dvalued_003f"> ¶</a></span></dt>
|
|
<dd><p>These procedures return <code class="code">#t</code> if and only if their arguments can,
|
|
respectively, be coerced to a real, rational, or integer value without a
|
|
loss of numerical precision.
|
|
</p>
|
|
<p><code class="code">real-valued?</code> will return <code class="code">#t</code> for complex numbers whose
|
|
imaginary parts are zero.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-nan_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">nan?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-nan_003f-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-infinite_003f"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">infinite?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-infinite_003f"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-finite_003f-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">finite?</strong> <var class="def-var-arguments">x</var><a class="copiable-link" href="#index-finite_003f-1"> ¶</a></span></dt>
|
|
<dd><p><code class="code">nan?</code> returns <code class="code">#t</code> if <var class="var">x</var> is a NaN value, <code class="code">#f</code>
|
|
otherwise. <code class="code">infinite?</code> returns <code class="code">#t</code> if <var class="var">x</var> is an infinite
|
|
value, <code class="code">#f</code> otherwise. <code class="code">finite?</code> returns <code class="code">#t</code> if <var class="var">x</var>
|
|
is neither infinite nor a NaN value, otherwise it returns <code class="code">#f</code>.
|
|
Every real number satisfies exactly one of these predicates. An
|
|
exception is raised if <var class="var">x</var> is not real.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-assert"><span class="category-def">Scheme Syntax: </span><span><strong class="def-name">assert</strong> <var class="def-var-arguments">expr</var><a class="copiable-link" href="#index-assert"> ¶</a></span></dt>
|
|
<dd><p>Raises an <code class="code">&assertion</code> condition if <var class="var">expr</var> evaluates to
|
|
<code class="code">#f</code>; otherwise evaluates to the value of <var class="var">expr</var>.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-error-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">error</strong> <var class="def-var-arguments">who message irritant1 ...</var><a class="copiable-link" href="#index-error-2"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-assertion_002dviolation"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">assertion-violation</strong> <var class="def-var-arguments">who message irritant1 ...</var><a class="copiable-link" href="#index-assertion_002dviolation"> ¶</a></span></dt>
|
|
<dd><p>These procedures raise compound conditions based on their arguments:
|
|
If <var class="var">who</var> is not <code class="code">#f</code>, the condition will include a <code class="code">&who</code>
|
|
condition whose <code class="code">who</code> field is set to <var class="var">who</var>; a <code class="code">&message</code>
|
|
condition will be included with a <code class="code">message</code> field equal to
|
|
<var class="var">message</var>; an <code class="code">&irritants</code> condition will be included with its
|
|
<code class="code">irritants</code> list given by <code class="code">irritant1 ...</code>.
|
|
</p>
|
|
<p><code class="code">error</code> produces a compound condition with the simple conditions
|
|
described above, as well as an <code class="code">&error</code> condition;
|
|
<code class="code">assertion-violation</code> produces one that includes an
|
|
<code class="code">&assertion</code> condition.
|
|
</p></dd></dl>
|
|
|
|
<dl class="first-deffn">
|
|
<dt class="deffn" id="index-vector_002dmap-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">vector-map</strong> <var class="def-var-arguments">proc v</var><a class="copiable-link" href="#index-vector_002dmap-1"> ¶</a></span></dt>
|
|
<dt class="deffnx def-cmd-deffn" id="index-vector_002dfor_002deach-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">vector-for-each</strong> <var class="def-var-arguments">proc v</var><a class="copiable-link" href="#index-vector_002dfor_002deach-1"> ¶</a></span></dt>
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<dd><p>These procedures implement the <code class="code">map</code> and <code class="code">for-each</code> contracts
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over vectors.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-vector-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">vector</strong> <var class="def-var-arguments">arg …</var><a class="copiable-link" href="#index-vector-2"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-vector_003f-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">vector?</strong> <var class="def-var-arguments">obj</var><a class="copiable-link" href="#index-vector_003f-2"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-make_002dvector-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">make-vector</strong> <var class="def-var-arguments">len</var><a class="copiable-link" href="#index-make_002dvector-2"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-make_002dvector-3"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">make-vector</strong> <var class="def-var-arguments">len fill</var><a class="copiable-link" href="#index-make_002dvector-3"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-list_002d_003evector-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">list->vector</strong> <var class="def-var-arguments">l</var><a class="copiable-link" href="#index-list_002d_003evector-2"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-vector_002d_003elist-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">vector->list</strong> <var class="def-var-arguments">v</var><a class="copiable-link" href="#index-vector_002d_003elist-2"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Vector-Creation.html">Dynamic Vector Creation and Validation</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-vector_002dlength-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">vector-length</strong> <var class="def-var-arguments">vector</var><a class="copiable-link" href="#index-vector_002dlength-2"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-vector_002dref-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">vector-ref</strong> <var class="def-var-arguments">vector k</var><a class="copiable-link" href="#index-vector_002dref-2"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-vector_002dset_0021-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">vector-set!</strong> <var class="def-var-arguments">vector k obj</var><a class="copiable-link" href="#index-vector_002dset_0021-2"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-vector_002dfill_0021-2"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">vector-fill!</strong> <var class="def-var-arguments">v fill</var><a class="copiable-link" href="#index-vector_002dfill_0021-2"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Vector-Accessors.html">Accessing and Modifying Vector Contents</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-call_002dwith_002dcurrent_002dcontinuation-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">call-with-current-continuation</strong> <var class="def-var-arguments">proc</var><a class="copiable-link" href="#index-call_002dwith_002dcurrent_002dcontinuation-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-call_002fcc-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">call/cc</strong> <var class="def-var-arguments">proc</var><a class="copiable-link" href="#index-call_002fcc-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Continuations.html">Continuations</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-values-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">values</strong> <var class="def-var-arguments">arg …</var><a class="copiable-link" href="#index-values-1"> ¶</a></span></dt>
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<dt class="deffnx def-cmd-deffn" id="index-call_002dwith_002dvalues-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">call-with-values</strong> <var class="def-var-arguments">producer consumer</var><a class="copiable-link" href="#index-call_002dwith_002dvalues-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Multiple-Values.html">Returning and Accepting Multiple Values</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-dynamic_002dwind-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">dynamic-wind</strong> <var class="def-var-arguments">in_guard thunk out_guard</var><a class="copiable-link" href="#index-dynamic_002dwind-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Dynamic-Wind.html">Dynamic Wind</a>, for documentation.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-apply-1"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">apply</strong> <var class="def-var-arguments">proc arg … arglst</var><a class="copiable-link" href="#index-apply-1"> ¶</a></span></dt>
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<dd><p>See <a class="xref" href="Fly-Evaluation.html">Procedures for On the Fly Evaluation</a>, for documentation.
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</p></dd></dl>
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</div>
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<p>
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Next: <a href="rnrs-unicode.html">rnrs unicode</a>, Previous: <a href="Library-Usage.html">Library Usage</a>, Up: <a href="R6RS-Standard-Libraries.html">R6RS Standard Libraries</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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