如何找到与两个数组相交的所有对象？ [英] How to find all OBJECTS that intersect two arrays?

问题描述

如果我有两个对象数组，例如：

If I have two arrays of objects, like this:

var a1 = [{"a":"b"}, {"b":"c"}, {"d":"e"}], 
    a2 = [{"g":"h"}, {"a":"b"}, {"i":"j"}]

（请注意，对象可以是任何结构，如此简单）

(note that objects may be of any structure, not so simple)

提取两个数组中所有对象的最有效方法是什么？

what is the most efficient way to extract all the objects that are in both arrays?

我检查了以下问题：在多个JavaScript数组之间查找匹配项，但这不是相同...

I checked this question: Finding matches between multiple JavaScript Arrays, but this is not the same...

推荐答案

您可以使用 JSON 展平对象.stringify（），然后检查交叉点。

You can flatten the objects using JSON.stringify() and then check for intersection.

var a1 = [{"a":"b"}, {"b":"c"}, {"d":"e"}], 
    a2 = [{"g":"h"}, {"a":"b"}, {"i":"j"}]

// flatten objects in second array
var stringifiedA2 = a2.map(function(x) {
    return JSON.stringify(x);
});

// get intersecting objects
var intersecting = a1.filter(function(x) {
    return stringifiedA2.indexOf(JSON.stringify(x)) !== -1;
});

相交将包含对象 { a： b}

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