为什么jQuery.inArray不适用于对象数组 [英] Why jQuery.inArray doesn't work on array of objects

问题描述

我有对象数组

var arr = [
        {"id" : "1", "description" : "one"},
        {"id" : "2", "description" : "two"},
        {"id" : "3", "description" : "three"}]

我需要获取索引，例如，对于id =2的对象。我做

I need get index, for example, for object with id="2".I do

var index = jQuery.inArray( {"id" : "2", "description" : "two"}, arr )

在索引中我得-1。

JsFiddle

推荐答案

因为 inArray 使用 === 来比较元素，不同的对象永远不会 === 彼此。 （他们彼此也不是 == 。）

Because inArray uses === to compare elements, and different objects are never === to one another. (They're also not == to one another.)

例如：

var a = {"foo": "bar"};
var b = {"foo": "bar"};
console.log(a === b); // "false"

您需要在它们上创建一个方法来比较它们的等价性，然后自己做搜索。

You'll need to create a method on them to compare them for equivalence, and then do the search yourself.

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