jQuery 中的 Grep 与过滤器? [英] Grep vs Filter in jQuery?

问题描述

我想知道 Grep 和 Filter 之间的区别:

I was wondering about the differences between Grep and Filter :

过滤器:

将匹配元素的集合减少到与选择器匹配的元素或通过函数的测试.

Reduce the set of matched elements to those that match the selector or pass the function's test.

格雷普:

查找满足过滤条件的数组元素功能.原数组不受影响.

Finds the elements of an array which satisfy a filter function. The original array is not affected.

好的.

所以如果我在 GREP 中这样做:

so if I do this in GREP :

var arr = [ 1, 9, 3, 8, 6, 1, 5, 9, 4, 7, 3, 8, 6, 9, 1 ];

myNewArray= jQuery.grep(arr, function(n, i){
  return (n != 5 && i > 4);
});

我也可以:

 var arr = [ 1, 9, 3, 8, 6, 1, 5, 9, 4, 7, 3, 8, 6, 9, 1 ];

myNewArray= $(arr).filter( function(n, i){
  return (n != 5 && i > 4);
});

在这两种情况下，我仍然可以访问原始数组...

In both situations I still can access to the original array...

那么……区别在哪里?

推荐答案

它们的功能相似，但用法不同.

They both function in similar ways however they differ in their usages.

过滤器函数旨在与 html 元素一起使用，这就是为什么它是一个可链接的函数，它返回一个 jQuery 对象，并且它接受像 ":even"、":odd" 或 ":visible" 等过滤器.你不能用 grep 函数做到这一点，它旨在成为数组的实用函数.

The filter function is intended to be used with html elements, and that is why it is a chainable function that returns a jQuery object and it accepts filters like ":even", ":odd" or ":visible" etc. You can't do that with the grep function, which is intended to be a utility function for arrays.

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