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現有這樣一段json，問怎么才能處理成為我想要的格式呢？

JavaScript

郎朗坤 2019-03-06 17:19:57

現有這樣一段json，問怎么才能處理成為我想要的格式呢？ articleList:[ {id:1,name:"小紅",user:456312,Occupation:"教練"}, {id:2,name:"小張",user:456321,Occupation:"歌手"}, {id:3,name:"小強",user:456312,Occupation:"老師"}, {id:1,name:"小分",user:456312,Occupation:"同事"}, {id:2,name:"小撒",user:456132,Occupation:"總經理"}, {id:3,name:"小看",user:456132,Occupation:"程序猿"}, {id:1,name:"小貧",user:451632,Occupation:"演員"} ], 把id相同的放在一個數組里面,用js代碼怎么實現呢？大神 articleList:[ { id:1, list:[ {name:"小紅",user:456312,Occupation:"教練"}, {name:"小分",user:456312,Occupation:"同事"}. {name:"小貧",user:451632,Occupation:"演員"} ] }, { id:2, list:[ {name:"小張",user:456321,Occupation:"歌手"}, {name:"小撒",user:456132,Occupation:"總經理"} ] }, { id:, list:[ {name:"小強",user:456312,Occupation:"老師"}, {name:"小看",user:456132,Occupation:"程序猿"} ] } ]

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3 回答

慕俠2389804

TA貢獻1719條經驗獲得超6個贊

這一段可以實現你說的功能。比較簡單，就是按id往數組對應的下標里寫東西就好了。

let articleList = [

{ id: 1, name: "小紅", user: 456312, Occupation: "教練" },

{ id: 2, name: "小張", user: 456321, Occupation: "歌手" },

{ id: 3, name: "小強", user: 456312, Occupation: "老師" },

{ id: 1, name: "小分", user: 456312, Occupation: "同事" },

{ id: 2, name: "小撒", user: 456132, Occupation: "總經理" },

{ id: 3, name: "小看", user: 456132, Occupation: "程序猿" },

{ id: 1, name: "小貧", user: 451632, Occupation: "演員" }

];

let newObject = [];

//循環

for (let index in articleList) {

//取對象

let o = articleList[index];

//第一次為一個id增加對象

if (!newObject[o.id]) {

newObject[o.id] = {

id: o.id,

list: []

}

//加入進去

newObject[o.id].list.push({

name: o.name,

user: o.user,

Occupation: o.Occupation

})

}

//打印結果

console.log(newObject);

以上代碼會在數組里產生空值，使用for（let i = 0;i<a.length;i++）遍歷會取出undefine。其實使用for in遍歷就不會出現這個問題。可以增加代碼如下：

let array = [];

for (let key in newObject){

array.push(newObject[key])

}

console.log('array',array);

可以看到是可以正常遍歷的，即使id是字符串，上述代碼也不會有問題，因為數組也可以使用字符串作為下標。

反對回復 2019-03-15

嗶嗶one

TA貢獻1854條經驗獲得超8個贊

let foldById = data => data.reduce((acc, cur) => {

let { id, name, user, Occupation } = cur;

let toInsert = { name, user, Occupation };

if (acc[id]){

acc[id].list.push(toInsert);

} else {

acc[id] = { id, list: [ toInsert ] }

}

return acc;

}, {});

結果是類數組對象。

test

let data = [

{ id: 1, name: "小紅", user: 456312, Occupation: "教練" },

{ id: 2, name: "小張", user: 456321, Occupation: "歌手" },

{ id: 3, name: "小強", user: 456312, Occupation: "老師" },

{ id: 1, name: "小分", user: 456312, Occupation: "同事" },

{ id: 2, name: "小撒", user: 456132, Occupation: "總經理" },

{ id: 3, name: "小看", user: 456132, Occupation: "程序猿" },

{ id: 1, name: "小貧", user: 451632, Occupation: "演員" }

];

foldById(data);

反對回復 2019-03-15

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現有這樣一段json，問怎么才能處理成為我想要的格式呢？

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