使用lodash更改密钥和组javascript对象

Question

我的对象结构如下：

{  
   guid x: { id: guid x, fooid: guid a, c: "baz"}, 
   guid y: { id: guid y, fooid: guid a, c: "baz"}, 
   guid z: { id: guid z, fooid: guid b, c: "baz"} 
}

我想用fooid作为关键。 但是有些对象具有相同的fooid并且应该被分组（这里作为数组但也可以是对象）：

{  
   guid a : [{ id: guid x, fooid: guid a, c: "bar"},{ id: guid y, 
                fooid: guid a, c: "bar"}],
   guid b : { id: guid z, fooid: 3, c: "bar"} 
}

我已经尝试用lodash这样做，但没有成功，任何帮助赞赏！ 试图寻找解决方案，但我不确定那些使它变得非常困难的术语。

Answer 1

使用lodash的_.groupBy() ：

 var data = { "guid x": { id: "guid x", fooid: "guid a", c: "baz"}, "guid y": { id: "guid y", fooid: "guid a", c: "baz"}, "guid z": { id: "guid z", fooid: "guid b", c: "baz"} }; var result = _.groupBy(data, 'fooid'); console.log(result); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script> 

Answer 2

使用lodash我认为这就是你要找的东西

 var data ={ 1 : { id: 1, fooid: 200, c: "baz"} , 2 : { id: 2, fooid: 200, c: "baz"} , 3 : { id: 3, fooid: 300, c: "baz"} , } var res = _(data) .values() .groupBy('fooid') .value() console.log(res) 

 .as-console-wrapper { max-height: 100%!important;} 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.js"></script> 

Answer 3

试试这个，注意我已经使用过ES6语法

 var obj = { id1: { id: 1, fooid: 2, c: "baz"}, id2: { id: 2, fooid: 2, c: "baz"}, id3: { id: 3, fooid: 3, c: "baz"} }; const newObj = Object.keys(obj).reduce((oldVal, newKey) => { const key = 'fooid' + obj[newKey]['fooid']; if(!oldVal.hasOwnProperty(key)){ oldVal[key] = []; } oldVal[key].push(obj[newKey]) return oldVal; },{}); console.log(newObj);