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返回值:ArrayjQuery.grep(array, callback,[invert])

概述

使用过滤函数过滤数组元素。

此函数至少传递两个参数:待过滤数组和过滤函数。过滤函数必须返回 true 以保留元素或 false 以删除元素。

参数

array,callback,[invert]Array,Function,BooleanV1.0

array:待过滤数组。

callback:此函数将处理数组每个元素。第一个参数为当前元素,第二个参数而元素索引值。此函数应返回一个布尔值。另外,此函数可设置为一个字符串,当设置为字符串时,将视为“lambda-form”(缩写形式?),其中 a 代表数组元素,i 代表元素索引值。如“a > 0”代表“function(a){ return a > 0; }”。

invert:如果 "invert" 为 false 或为设置,则函数返回数组中由过滤函数返回 true 的元素,当"invert" 为 true,则返回过滤函数中返回 false 的元素集。

示例

描述:

过滤数组中小于 0 的元素。

jQuery 代码:
$.grep( [0,1,2], function(n,i){ return n > 0; });
结果:
[1, 2]

描述:

排除数组中大于 0 的元素,使用第三个参数进行排除。

jQuery 代码:
$.grep( [0,1,2], function(n,i){ return n > 0; }, true);
结果:
[0]
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