查找ID对象在JavaScript中对象的数组 [英] Find object by id in an array of JavaScript objects

问题描述

我有一个数组：

myArray = [{'id':'73','foo':'bar'},{'id':'45','foo':'bar'}, etc.]

我无法改变阵列的结构。我被传递 45 的ID，我想获得'酒吧'数组中的对象。

I'm unable to change the structure of the array. I'm being passed an id of 45, and I want to get 'bar' for that object in the array.

我如何做到这一点的JavaScript或使用jQuery？

How do I do this in JavaScript or using jQuery?

推荐答案

当你已经在使用jQuery，您可以使用的grep其目的是用于搜索的阵列的功能：

As you are already using jQuery, you can use the grep function which is intended for searching an array:

var result = $.grep(myArray, function(e){ return e.id == id; });

结果与找到的项目阵列。如果你知道对象是永远存在的，它只能出现一次，你可以使用结果[0]包含.foo 来获得的价值。否则，你应该检查所生成的数组的长度。例如：

The result is an array with the items found. If you know that the object is always there and that it only occurs once, you can just use result[0].foo to get the value. Otherwise you should check the length of the resulting array. Example:

if (result.length == 0) {
  // not found
} else if (result.length == 1) {
  // access the foo property using result[0].foo
} else {
  // multiple items found
}

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