JavaScript - 过滤嵌套数组 [英] JavaScript - Filter Nested Arrays

问题描述

我正在尝试在 javascript 中过滤一个数组，并且在嵌套数组时遇到困难.

I'm trying to filter an array in javascript, and am struggling when the array is nested.

目前，我能做到的最远的是过滤一个平面数组:

At the moment, the furthest I've been able to get is filtering a flat array:

var ID = 3

var arr = [{ id : 1, name: "a" }, { id : 2, name: "b" }, { id : 3, name: "c" }]

var result = arr.filter(function( obj ) {return obj.id == ID;});
alert(result[0].name);

虽然如果数组看起来像这样，上面的方法不起作用:

Though the above doesn't work if the array looks like this instead:

var arr2 = [
    [{ id : 1, name: "a" },{ id : 2, name: "b" }],
    [{ id : 3, name: "c" },{ id : 4, name: "d" }]
] 

可以找到两个例子:https://jsfiddle.net/vjt45xv4/

任何在嵌套数组上找到合适结果的提示将不胜感激.

Any tips for finding the appropriate result on the nested array would be much appreciated.

谢谢！

推荐答案

展平数组然后过滤它:

arr.reduce(function(a,b) { return a.concat(b);  })
   .filter(function(obj) { return obj.id == ID; });

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