99 lines
5.7 KiB
HTML
99 lines
5.7 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>SRFI-69 Table properties (Guile Reference Manual)</title>
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<div class="subsubsection-level-extent" id="SRFI_002d69-Table-properties">
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Next: <a href="SRFI_002d69-Hash-table-algorithms.html" accesskey="n" rel="next">Hash table algorithms</a>, Previous: <a href="SRFI_002d69-Accessing-table-items.html" accesskey="p" rel="prev">Accessing table items</a>, Up: <a href="SRFI_002d69.html" accesskey="u" rel="up">SRFI-69 - Basic hash tables</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="Table-properties"><span>7.5.39.3 Table properties<a class="copiable-link" href="#Table-properties"> ¶</a></span></h4>
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<dl class="first-deffn">
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<dt class="deffn" id="index-hash_002dtable_002dsize"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">hash-table-size</strong> <var class="def-var-arguments">table</var><a class="copiable-link" href="#index-hash_002dtable_002dsize"> ¶</a></span></dt>
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<dd><p>Answer the number of associations in <var class="var">table</var>. This is guaranteed
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to run in constant time for non-weak tables.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-hash_002dtable_002dkeys"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">hash-table-keys</strong> <var class="def-var-arguments">table</var><a class="copiable-link" href="#index-hash_002dtable_002dkeys"> ¶</a></span></dt>
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<dd><p>Answer an unordered list of the keys in <var class="var">table</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-hash_002dtable_002dvalues"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">hash-table-values</strong> <var class="def-var-arguments">table</var><a class="copiable-link" href="#index-hash_002dtable_002dvalues"> ¶</a></span></dt>
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<dd><p>Answer an unordered list of the values in <var class="var">table</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-hash_002dtable_002dwalk"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">hash-table-walk</strong> <var class="def-var-arguments">table proc</var><a class="copiable-link" href="#index-hash_002dtable_002dwalk"> ¶</a></span></dt>
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<dd><p>Invoke <var class="var">proc</var> once for each association in <var class="var">table</var>, passing
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the key and value as arguments.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-hash_002dtable_002dfold"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">hash-table-fold</strong> <var class="def-var-arguments">table proc init</var><a class="copiable-link" href="#index-hash_002dtable_002dfold"> ¶</a></span></dt>
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<dd><p>Invoke <code class="code">(<var class="var">proc</var> <var class="var">key</var> <var class="var">value</var> <var class="var">previous</var>)</code> for
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each <var class="var">key</var> and <var class="var">value</var> in <var class="var">table</var>, where <var class="var">previous</var> is
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the result of the previous invocation, using <var class="var">init</var> as the first
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<var class="var">previous</var> value. Answer the final <var class="var">proc</var> result.
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</p></dd></dl>
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<dl class="first-deffn">
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<dt class="deffn" id="index-hash_002dtable_002d_003ealist"><span class="category-def">Scheme Procedure: </span><span><strong class="def-name">hash-table->alist</strong> <var class="def-var-arguments">table</var><a class="copiable-link" href="#index-hash_002dtable_002d_003ealist"> ¶</a></span></dt>
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<dd><p>Answer an alist where each association in <var class="var">table</var> is an
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association in the result.
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</p></dd></dl>
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