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146 lines
4.1 KiB
XML
146 lines
4.1 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: 2e60c5134e7a847c99f81eb3f7ecee1f5efeeace Maintainer: PhilDaiguille Status: ready -->
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<!-- Reviewed: no -->
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<!-- CREDITS: DavidA. -->
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<refentry xml:id="function.current" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>current</refname>
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<refpurpose>Devuelve el elemento actual del array</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>mixed</type><methodname>current</methodname>
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<methodparam><type class="union"><type>array</type><type>object</type></type><parameter>array</parameter></methodparam>
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</methodsynopsis>
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<para>
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Cada array mantiene un puntero interno, que se inicializa
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cuando se inserta el primer elemento en el array.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>array</parameter></term>
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<listitem>
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<para>
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El array.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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<function>current</function> solo devuelve
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el elemento actual apuntado por el puntero interno del
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array <parameter>array</parameter>.
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<function>current</function> no desplaza el puntero.
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Si el puntero está más allá del último elemento de la lista,
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<function>current</function> devuelve &false;.
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</para>
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&return.falseproblem;
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</refsect1>
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<refsect1 role="changelog">
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&reftitle.changelog;
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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&standard.changelog.calling-on-objects;
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</tbody>
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</tgroup>
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</informaltable>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title>Ejemplo de uso de <function>current</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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echo $mode = current($transport), PHP_EOL; // $mode = 'foot';
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echo $mode = next($transport), PHP_EOL; // $mode = 'bike';
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echo $mode = current($transport), PHP_EOL; // $mode = 'bike';
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echo $mode = prev($transport), PHP_EOL; // $mode = 'foot';
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echo $mode = end($transport), PHP_EOL; // $mode = 'plane';
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echo $mode = current($transport), PHP_EOL; // $mode = 'plane';
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$arr = array();
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var_dump(current($arr)); // bool(false)
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$arr = array(array());
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var_dump(current($arr)); // array(0) { }
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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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</refsect1>
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<refsect1 role="notes">
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&reftitle.notes;
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<note>
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<simpara>
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No es posible distinguir el final de un array o el resultado
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de la llamada <function>current</function> sobre un array vacío,
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a partir del elemento <type>bool</type> &false;.
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Para recorrer correctamente un array que
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puede contener el elemento &false;, ver la estructura de control &foreach;.
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</simpara>
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<simpara>
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Para seguir utilizando <function>current</function> y verificar
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correctamente si el valor es realmente un elemento del array,
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la <function>key</function> del elemento <function>current</function>
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debería compararse estrictamente diferente del elemento &null;.
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</simpara>
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</note>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>end</function></member>
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<member><function>key</function></member>
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<member><function>each</function></member>
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<member><function>prev</function></member>
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<member><function>reset</function></member>
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<member><function>next</function></member>
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<member>&foreach;</member>
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</simplelist>
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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:"~/.phpdoc/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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