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git-svn-id: https://svn.php.net/repository/phpdoc/pl/trunk@179167 c90b9560-bf6c-de11-be94-00142212c4b1
90 lines
2.5 KiB
XML
90 lines
2.5 KiB
XML
<?xml version="1.0" encoding="iso-8859-2"?>
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<!-- EN-Revision: 1.8 Maintainer: leszek Status: ready -->
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<!-- $Revision: 1.6 $ -->
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<refentry id="function.array-reduce">
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<refnamediv>
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<refname>array_reduce</refname>
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<refpurpose>
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Iteracyjnie zredukuj tablicê do pojedyñczej warto¶ci u¿ywaj±c funkcji
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zwrotnej
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</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Opis</title>
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<methodsynopsis>
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<type>mixed</type><methodname>array_reduce</methodname>
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<methodparam><type>array</type><parameter>wej¶cie</parameter></methodparam>
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<methodparam><type>callback</type><parameter>funkcja_zwrotna</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>pocz±tek</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>array_reduce</function> iteracyjnie stosuje funkcjê
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<parameter>funkcja_zwrotna</parameter> na ka¿dym elemencie tablicy
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<parameter>wej¶cie</parameter> aby zredukowaæ tablicê to pojedyñczej
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warto¶ci. Je¶li podany zosta³ opcjonalny parametr <parameter>pocz±tek
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</parameter>, bêdzie on u¿yty na pocz±tku procesu, lub jako zwracana
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warto¶æ je¶li tablica jest pusta.
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</para>
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<para>
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<example>
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<title>Przyk³ad u¿ycia <function>array_reduce</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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function rsum($v, $w)
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{
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$v += $w;
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return $v;
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}
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function rmul($v, $w)
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{
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$v *= $w;
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return $v;
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}
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$a = array(1, 2, 3, 4, 5);
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$x = array();
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$b = array_reduce($a, "rsum");
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$c = array_reduce($a, "rmul", 10);
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$d = array_reduce($x, "rsum", 1);
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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Po wykonaniu powy¿szego kodu zmienna <varname>$b</varname> bêdzie
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zawiera³a <literal>15</literal>, <varname>$c</varname>
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<literal>1200</literal> (= 1*2*3*4*5*10) a
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<varname>$d</varname> containing <literal>1</literal>.
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</para>
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<para>
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Patrz tak¿e: <function>array_filter</function>,
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<function>array_map</function>, <function>array_unique</function> i
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<function>array_count_values</function>.
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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