JavaScript 按 id 合并对象
在 Javascript 中合并两个数组的正确方法是什么?
What's the correct way to merge two arrays in Javascript?
我有两个数组(例如):
I've got two arrays (for example):
var a1 = [{ id : 1, name : "test"}, { id : 2, name : "test2"}]
var a2 = [{ id : 1, count : "1"}, {id : 2, count : "2"}]
我希望能够得到类似的结果:
I want to be able to end up with something like:
var a3 = [{ id : 1, name : "test", count : "1"},
{ id : 2, name : "test2", count : "2"}]
根据id"字段连接两个数组，并简单地添加额外数据.
Where the two arrays are being joined based on the 'id' field and extra data is simply being added.
我尝试使用 _.union 来执行此操作，但它只是将第二个数组中的值覆盖到第一个数组中
I tried to use _.union to do this, but it simply overwrites the values from the second array into the first one
推荐答案
这应该可以解决问题:
var mergedList = _.map(a1, function(item){
return _.extend(item, _.findWhere(a2, { id: item.id }));
});
这里假设a1中第二个对象的id应该是2而不是2"
This assumes that the id of the second object in a1 should be 2 rather than "2"
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