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<title>Exported generic functions (The data-lens/beta/transducers Reference Manual)</title>
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<span id="Exported-generic-functions"></span><div class="header">
<p>
Next: <a href="Exported-classes.html" accesskey="n" rel="next">Exported classes</a>, Previous: <a href="Exported-functions.html" accesskey="p" rel="prev">Exported functions</a>, Up: <a href="Exported-definitions.html" accesskey="u" rel="up">Exported definitions</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indexes.html" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<span id="Generic-functions"></span><h4 class="subsection">4.1.3 Generic functions</h4>
<dl>
<dt id="index-extract_002dkey">Generic Function: <strong>extract-key</strong> <em>MAP KEY</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2236_2236EXTRACT_002dKEY-generic-function"></span><span id="index-Generic-Function_002c-extract_002dkey"></span>
<dl compact="compact">
<dt><strong>Package</strong></dt>
<dd><p><a href="The-data_002dlens-package.html#go-to-the-DATA_002dLENS-package"><tt>data-lens</tt></a>
</p></dd>
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002flens_002elisp-file.html#go-to-the-data_002dlens_002flens_2024lisp-file"><tt>lens.lisp</tt></a> (file)
</p></dd>
<dt><strong>Methods</strong></dt>
<dd><dl>
<dt id="index-extract_002dkey-1">Method: <strong>extract-key</strong> <em>(MAP <tt>hash-table</tt>) KEY</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2236_2236EXTRACT_002dKEY-COMMON_002dLISP_2236_2236HASH_002dTABLE-COMMON_002dLISP_2236_2236T-method"></span><span id="index-Method_002c-extract_002dkey"></span>
</dd></dl>
<dl>
<dt id="index-extract_002dkey-2">Method: <strong>extract-key</strong> <em>(MAP <tt>list</tt>) KEY</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2236_2236EXTRACT_002dKEY-COMMON_002dLISP_2236_2236LIST-COMMON_002dLISP_2236_2236T-method"></span><span id="index-Method_002c-extract_002dkey-1"></span>
</dd></dl>
</dd>
</dl>
</dd></dl>
<dl>
<dt id="index-functionalize">Generic Function: <strong>functionalize</strong> <em>IT</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2236_2236FUNCTIONALIZE-generic-function"></span><span id="index-Generic-Function_002c-functionalize"></span>
<dl compact="compact">
<dt><strong>Package</strong></dt>
<dd><p><a href="The-data_002dlens-package.html#go-to-the-DATA_002dLENS-package"><tt>data-lens</tt></a>
</p></dd>
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002flens_002elisp-file.html#go-to-the-data_002dlens_002flens_2024lisp-file"><tt>lens.lisp</tt></a> (file)
</p></dd>
<dt><strong>Methods</strong></dt>
<dd><dl>
<dt id="index-functionalize-1">Method: <strong>functionalize</strong> <em>(IT <tt>hash-table</tt>)</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2236_2236FUNCTIONALIZE-COMMON_002dLISP_2236_2236HASH_002dTABLE-method"></span><span id="index-Method_002c-functionalize"></span>
</dd></dl>
<dl>
<dt id="index-functionalize-2">Method: <strong>functionalize</strong> <em>(IT <tt>vector</tt>)</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2236_2236FUNCTIONALIZE-COMMON_002dLISP_2236_2236VECTOR-method"></span><span id="index-Method_002c-functionalize-1"></span>
</dd></dl>
<dl>
<dt id="index-functionalize-3">Method: <strong>functionalize</strong> <em>(IT <tt>symbol</tt>)</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2236_2236FUNCTIONALIZE-COMMON_002dLISP_2236_2236SYMBOL-method"></span><span id="index-Method_002c-functionalize-2"></span>
</dd></dl>
<dl>
<dt id="index-functionalize-4">Method: <strong>functionalize</strong> <em>(IT <tt>function</tt>)</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2236_2236FUNCTIONALIZE-COMMON_002dLISP_2236_2236FUNCTION-method"></span><span id="index-Method_002c-functionalize-3"></span>
</dd></dl>
</dd>
</dl>
</dd></dl>
<dl>
<dt id="index-init">Generic Function: <strong>init</strong> <em>CLIENT</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236INIT-generic-function"></span><span id="index-Generic-Function_002c-init"></span>
<dl compact="compact">
<dt><strong>Package</strong></dt>
<dd><p><a href="The-data_002dlens_002etransducers_002einternals-package.html#go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS-package"><tt>data-lens.transducers.internals</tt></a>
</p></dd>
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002ftransducer_002dprotocol_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002ftransducer_002dprotocol_2024lisp-file"><tt>transducer-protocol.lisp</tt></a> (file)
</p></dd>
<dt><strong>Methods</strong></dt>
<dd><dl>
<dt id="index-init-1">Method: <strong>init</strong> <em>(IT <tt>(eql list-builder)</tt>)</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236INIT-_2768eql-DATA_002dLENS_2024TRANSDUCERS_2236_2236LIST_002dBUILDER_2769-method"></span><span id="index-Method_002c-init"></span>
<dl compact="compact">
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002ftransducers_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002ftransducers_2024lisp-file"><tt>transducers.lisp</tt></a> (file)
</p></dd>
</dl>
</dd></dl>
<dl>
<dt id="index-init-2">Method: <strong>init</strong> <em>(IT <tt>(eql vector-builder)</tt>)</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236INIT-_2768eql-DATA_002dLENS_2024TRANSDUCERS_2236_2236VECTOR_002dBUILDER_2769-method"></span><span id="index-Method_002c-init-1"></span>
<dl compact="compact">
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002ftransducers_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002ftransducers_2024lisp-file"><tt>transducers.lisp</tt></a> (file)
</p></dd>
</dl>
</dd></dl>
<dl>
<dt id="index-init-3">Method: <strong>init</strong> <em>(IT <tt>(eql hash-table-builder)</tt>)</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236INIT-_2768eql-DATA_002dLENS_2024TRANSDUCERS_2236_2236HASH_002dTABLE_002dBUILDER_2769-method"></span><span id="index-Method_002c-init-2"></span>
<dl compact="compact">
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002ftransducers_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002ftransducers_2024lisp-file"><tt>transducers.lisp</tt></a> (file)
</p></dd>
</dl>
</dd></dl>
</dd>
</dl>
</dd></dl>
<dl>
<dt id="index-reduce_002dgeneric">Generic Function: <strong>reduce-generic</strong> <em>SEQ FUNC INIT</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236REDUCE_002dGENERIC-generic-function"></span><span id="index-Generic-Function_002c-reduce_002dgeneric"></span>
<dl compact="compact">
<dt><strong>Package</strong></dt>
<dd><p><a href="The-data_002dlens_002etransducers_002einternals-package.html#go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS-package"><tt>data-lens.transducers.internals</tt></a>
</p></dd>
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002ftransducer_002dprotocol_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002ftransducer_002dprotocol_2024lisp-file"><tt>transducer-protocol.lisp</tt></a> (file)
</p></dd>
<dt><strong>Methods</strong></dt>
<dd><dl>
<dt id="index-reduce_002dgeneric-1">Method: <strong>reduce-generic</strong> <em>(SEQ <tt>lazy-sequence</tt>) (FUNC <tt>function</tt>) INIT</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236REDUCE_002dGENERIC-DATA_002dLENS_2024TRANSDUCERS_2236_2236LAZY_002dSEQUENCE-COMMON_002dLISP_2236_2236FUNCTION-COMMON_002dLISP_2236_2236T-method"></span><span id="index-Method_002c-reduce_002dgeneric"></span>
<dl compact="compact">
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002flazy_002dsequence_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002flazy_002dsequence_2024lisp-file"><tt>lazy-sequence.lisp</tt></a> (file)
</p></dd>
</dl>
</dd></dl>
<dl>
<dt id="index-reduce_002dgeneric-2">Method: <strong>reduce-generic</strong> <em>(SEQ <tt>sequence</tt>) (FUNC <tt>function</tt>) INIT</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236REDUCE_002dGENERIC-COMMON_002dLISP_2236_2236SEQUENCE-COMMON_002dLISP_2236_2236FUNCTION-COMMON_002dLISP_2236_2236T-method"></span><span id="index-Method_002c-reduce_002dgeneric-1"></span>
</dd></dl>
<dl>
<dt id="index-reduce_002dgeneric-3">Method: <strong>reduce-generic</strong> <em>(SEQ <tt>sequence</tt>) (FUNC <tt>symbol</tt>) INIT</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236REDUCE_002dGENERIC-COMMON_002dLISP_2236_2236SEQUENCE-COMMON_002dLISP_2236_2236SYMBOL-COMMON_002dLISP_2236_2236T-method"></span><span id="index-Method_002c-reduce_002dgeneric-2"></span>
</dd></dl>
<dl>
<dt id="index-reduce_002dgeneric-4">Method: <strong>reduce-generic</strong> <em>SEQ (FUNC <tt>symbol</tt>) INIT</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236REDUCE_002dGENERIC-COMMON_002dLISP_2236_2236T-COMMON_002dLISP_2236_2236SYMBOL-COMMON_002dLISP_2236_2236T-method"></span><span id="index-Method_002c-reduce_002dgeneric-3"></span>
</dd></dl>
<dl>
<dt id="index-reduce_002dgeneric-5">Method: <strong>reduce-generic</strong> <em>(SEQ <tt>hash-table</tt>) (FUNC <tt>function</tt>) INIT</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236REDUCE_002dGENERIC-COMMON_002dLISP_2236_2236HASH_002dTABLE-COMMON_002dLISP_2236_2236FUNCTION-COMMON_002dLISP_2236_2236T-method"></span><span id="index-Method_002c-reduce_002dgeneric-4"></span>
</dd></dl>
</dd>
</dl>
</dd></dl>
<dl>
<dt id="index-stepper">Generic Function: <strong>stepper</strong> <em>CLIENT</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236STEPPER-generic-function"></span><span id="index-Generic-Function_002c-stepper"></span>
<dl compact="compact">
<dt><strong>Package</strong></dt>
<dd><p><a href="The-data_002dlens_002etransducers_002einternals-package.html#go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS-package"><tt>data-lens.transducers.internals</tt></a>
</p></dd>
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002ftransducer_002dprotocol_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002ftransducer_002dprotocol_2024lisp-file"><tt>transducer-protocol.lisp</tt></a> (file)
</p></dd>
<dt><strong>Methods</strong></dt>
<dd><dl>
<dt id="index-stepper-1">Method: <strong>stepper</strong> <em>(IT <tt>(eql list-builder)</tt>)</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236STEPPER-_2768eql-DATA_002dLENS_2024TRANSDUCERS_2236_2236LIST_002dBUILDER_2769-method"></span><span id="index-Method_002c-stepper"></span>
<dl compact="compact">
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002ftransducers_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002ftransducers_2024lisp-file"><tt>transducers.lisp</tt></a> (file)
</p></dd>
</dl>
</dd></dl>
<dl>
<dt id="index-stepper-2">Method: <strong>stepper</strong> <em>(IT <tt>(eql vector-builder)</tt>)</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236STEPPER-_2768eql-DATA_002dLENS_2024TRANSDUCERS_2236_2236VECTOR_002dBUILDER_2769-method"></span><span id="index-Method_002c-stepper-1"></span>
<dl compact="compact">
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002ftransducers_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002ftransducers_2024lisp-file"><tt>transducers.lisp</tt></a> (file)
</p></dd>
</dl>
</dd></dl>
<dl>
<dt id="index-stepper-3">Method: <strong>stepper</strong> <em>(IT <tt>(eql hash-table-builder)</tt>)</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236STEPPER-_2768eql-DATA_002dLENS_2024TRANSDUCERS_2236_2236HASH_002dTABLE_002dBUILDER_2769-method"></span><span id="index-Method_002c-stepper-2"></span>
<dl compact="compact">
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002ftransducers_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002ftransducers_2024lisp-file"><tt>transducers.lisp</tt></a> (file)
</p></dd>
</dl>
</dd></dl>
</dd>
</dl>
</dd></dl>
<dl>
<dt id="index-unwrap">Generic Function: <strong>unwrap</strong> <em>CLIENT OBJ</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236UNWRAP-generic-function"></span><span id="index-Generic-Function_002c-unwrap"></span>
<dl compact="compact">
<dt><strong>Package</strong></dt>
<dd><p><a href="The-data_002dlens_002etransducers_002einternals-package.html#go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS-package"><tt>data-lens.transducers.internals</tt></a>
</p></dd>
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002ftransducer_002dprotocol_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002ftransducer_002dprotocol_2024lisp-file"><tt>transducer-protocol.lisp</tt></a> (file)
</p></dd>
<dt><strong>Methods</strong></dt>
<dd><dl>
<dt id="index-unwrap-1">Method: <strong>unwrap</strong> <em>(IT <tt>(eql list-builder)</tt>) OBJ</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236UNWRAP-_2768eql-DATA_002dLENS_2024TRANSDUCERS_2236_2236LIST_002dBUILDER_2769-COMMON_002dLISP_2236_2236T-method"></span><span id="index-Method_002c-unwrap"></span>
<dl compact="compact">
<dt><strong>Source</strong></dt>
<dd><p><a href="The-data_002dlens_002fbeta_002ftransducers_002ftransducers_002elisp-file.html#go-to-the-data_002dlens_002fbeta_002ftransducers_002ftransducers_2024lisp-file"><tt>transducers.lisp</tt></a> (file)
</p></dd>
</dl>
</dd></dl>
<dl>
<dt id="index-unwrap-2">Method: <strong>unwrap</strong> <em>CLIENT OBJ</em></dt>
<dd><span id="go-to-the-DATA_002dLENS_2024TRANSDUCERS_2024INTERNALS_2236_2236UNWRAP-COMMON_002dLISP_2236_2236T-COMMON_002dLISP_2236_2236T-method"></span><span id="index-Method_002c-unwrap-1"></span>
</dd></dl>
</dd>
</dl>
</dd></dl>
<hr>
<div class="header">
<p>
Next: <a href="Exported-classes.html" accesskey="n" rel="next">Exported classes</a>, Previous: <a href="Exported-functions.html" accesskey="p" rel="prev">Exported functions</a>, Up: <a href="Exported-definitions.html" accesskey="u" rel="up">Exported definitions</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Indexes.html" title="Index" rel="index">Index</a>]</p>
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