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git-svn-id: https://svn.php.net/repository/phpdoc/zh/trunk@324983 c90b9560-bf6c-de11-be94-00142212c4b1
246 lines
7.0 KiB
XML
Executable File
246 lines
7.0 KiB
XML
Executable File
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 5faa7a6747bca628b3bdcc9f93aec5603b65581f Maintainer: HonestQiao Status: ready -->
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<!-- Reviewed: no Maintainer: HonestQiao -->
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<refentry xml:id="function.array-diff-uassoc" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>array_diff_uassoc</refname>
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<refpurpose>用用户提供的回调函数做索引检查来计算数组的差集</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>array</type><methodname>array_diff_uassoc</methodname>
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<methodparam><type>array</type><parameter>array1</parameter></methodparam>
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<methodparam><type>array</type><parameter>array2</parameter></methodparam>
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<methodparam choice="opt"><type>array</type><parameter>...</parameter></methodparam>
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<methodparam><type>callback</type><parameter>key_compare_func</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>array_diff_uassoc</function> 返回一个数组，该数组包括了所有在
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<parameter>array1</parameter> 中但是不在任何其它参数数组中的值。注意和
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<function>array_diff</function> 不同的是键名也用于比较。
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</para>
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<para>
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此比较是通过用户提供的回调函数来进行的。如果认为第一个参数小于，等于，或大于第二个参数时必须分别返回一个小于零，等于零，或大于零的整数。这和
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<function>array_diff_assoc</function>
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不同的是还使用了比较索引的内部函数。
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</para>
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<para>
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<example>
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<title><function>array_diff_uassoc</function> 例子</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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function key_compare_func($a, $b)
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{
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if ($a === $b) {
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return 0;
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}
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return ($a > $b)? 1:-1;
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}
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$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
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$array2 = array("a" => "green", "yellow", "red");
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$result = array_diff_uassoc($array1, $array2, "key_compare_func");
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print_r($result);
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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Array
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(
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[b] => brown
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[c] => blue
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[0] => red
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)
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]]>
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</screen>
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</example>
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</para>
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<simpara>
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上面的例子中 <literal>"a" => "green"</literal>
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出现在两个数组中因此不在函数的输出中。但是
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<literal>0 => "red"</literal> 却在输出中，因为第二个参数中的
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<literal>"red"</literal> 的键名是 <literal>1</literal>。
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</simpara>
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<simpara>
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两个索引是否相同是由用户提供的回调函数来检查的。
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</simpara>
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<note>
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<simpara>
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注意本函数只检查了多维数组中的一维。当然可以用
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<literal>array_diff_uassoc($array1[0], $array2[0], "key_compare_func");</literal>
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检查更深的维度。
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</simpara>
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</note>
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<para>
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参见
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<function>array_diff</function>，<function>array_diff_assoc</function>，<function>array_udiff</function>，<function>array_udiff_assoc</function>，<function>array_udiff_uassoc</function>，<function>array_intersect</function>，<function>array_intersect_assoc</function>，<function>array_uintersect</function>，<function>array_uintersect_assoc</function>
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和
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<function>array_uintersect_uassoc</function>。
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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>array1</parameter></term>
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<listitem>
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<para>
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The array to compare from
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>array2</parameter></term>
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<listitem>
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<para>
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An array to compare against
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>...</parameter></term>
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<listitem>
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<para>
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More arrays to compare against
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>key_compare_func</parameter></term>
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<listitem>
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<para>
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&return.callbacksort;
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</para>
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&callback.cmp;
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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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Returns an <type>array</type> containing all the entries from
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<parameter>array1</parameter> that are not present in any of the other arrays.
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</para>
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</refsect1>
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<!--
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<refsect1 role="errors">
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&reftitle.errors;
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&errors.no.unusual.errors;
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</refsect1>
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-->
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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><function>array_diff_uassoc</function> example</title>
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<para>
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The <literal>"a" => "green"</literal>
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pair is present in both arrays and thus it is not in the output from the
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function. Unlike this, the pair <literal>0 => "red"</literal>
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is in the output because in the second argument <literal>"red"</literal>
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has key which is <literal>1</literal>.
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</para>
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<programlisting role="php">
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<![CDATA[
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<?php
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function key_compare_func($a, $b)
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{
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if ($a === $b) {
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return 0;
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}
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return ($a > $b)? 1:-1;
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}
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$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
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$array2 = array("a" => "green", "yellow", "red");
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$result = array_diff_uassoc($array1, $array2, "key_compare_func");
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print_r($result);
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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Array
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(
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[b] => brown
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[c] => blue
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[0] => red
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)
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]]>
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</screen>
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<simpara>
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The equality of 2 indices is checked by the user supplied callback function.
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</simpara>
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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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<para>
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This function only checks one dimension of a n-dimensional
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array. Of course you can check deeper dimensions by using, for example,
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<literal>array_diff_uassoc($array1[0], $array2[0], "key_compare_func");</literal>.
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</para>
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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>array_diff</function></member>
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<member><function>array_diff_assoc</function></member>
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<member><function>array_udiff</function></member>
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<member><function>array_udiff_assoc</function></member>
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<member><function>array_udiff_uassoc</function></member>
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<member><function>array_intersect</function></member>
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<member><function>array_intersect_assoc</function></member>
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<member><function>array_uintersect</function></member>
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<member><function>array_uintersect_assoc</function></member>
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<member><function>array_uintersect_uassoc</function></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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