根据属性将对象数组分解为单独的数组 [英] break array of objects into separate arrays based on a property

问题描述

假设我有一个这样的数组:

Say I have an array like this:

var arr = [
    {type:"orange", title:"First"},
    {type:"orange", title:"Second"},
    {type:"banana", title:"Third"},
    {type:"banana", title:"Fourth"}
];

并且我希望将其拆分为具有相同类型对象的数组，因此:

and I want this to be split up into arrays that have objects which have same type so:

[{type:"orange", title:"First"},
{type:"orange", title:"Second"}]

[{type:"banana", title:"Third"},
{type:"banana", title:"Fourth"}]

但我想一般地这样做，所以没有指定橙色或香蕉的 if 语句

But I want to do this generically so not having an if statement that specifies orange or banana

// not like this
for (prop in arr){
    if (arr[prop] === "banana"){
       //add to new array
    }
}

想法?JQuery 和 Underscore 都是可以使用的选项.

Thoughts? JQuery and Underscore are both options to use.

推荐答案

JQuery 和 Underscore 都是可以使用的选项.

JQuery and Underscore are both options to use.

Underscore 的 groupBy 正是您所需要的.

Underscore's groupBy does exactly what you need.

_.groupBy(arr, "type")

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