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。然而，一些对象具有相同的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"} 
}

我尝试用lodash这样做但没有成功，任何帮助表示赞赏！试图寻找解决方案，但我不确定那些使其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，请注意我已经使用过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);

使用lodash更改密钥和组javascript对象

3 个答案: