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減少時未正確打印數組

JavaScript

繁花不似錦 2023-11-02 20:07:19

我有 1 個 JavaScript 數組。我想根據日期合并這個數組并獲取每個價格并將其放入字段中。然而，我只得到的價格是 1。同一日期的其他價格未打印。誰能幫我為什么？謝謝這是代碼：JavaScript：var data = [ { "date":"2010-01-01", "name":"a" }, { "date":"2010-02-01", "name":"b" }, { "date":"2010-03-01", "name":"c" }, { "date":"2010-01-01", "name":"aa" }, ]var result1 = data.reduce((p, c) => (p[c.date] = Object.assign({},{name: null}, p[c.date], c)) && p , {});var final = Object.keys(result1).map(x=>result1[x])console.log(final)您可以在此處訪問代碼：https://jsfiddle.net/q0wn2vuo/我想要這樣的輸出：[{ 日期: "2010-01-01", 名稱: 'a,aa', }, { 日期: "2010-02-01", 名稱: 'b', }, { 日期: "2010-03-01 “，價格：'c'，}]

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2 回答

九州編程

TA貢獻1785條經驗獲得超4個贊

干得好。

var data = [

{

"date":"2010-01-01",

"name":"a"

{

"date":"2010-02-01",

"name":"b"

{

"date":"2010-03-01",

"name":"c"

{

"date":"2010-01-01",

"name":"aa"

]

const resultSet = {};

for (let i = 0, _len = data.length; i < _len; i++ ) {

if(resultSet[data[i].date]){

resultSet[data[i].date] += ","+data[i].name

}

else{

resultSet[data[i].date] = data[i].name

}

const resultArr = Object.entries(resultSet).map(([key,value])=>{

return { date: key, name: value }

})

console.log(resultArr)

反對回復 2023-11-02

婷婷同學_

TA貢獻1844條經驗獲得超8個贊

嘗試：

var data = [

{

"date":"2010-01-01",

"name":"a"

{

"date":"2010-02-01",

"name":"b"

{

"date":"2010-03-01",

"name":"c"

{

"date":"2010-01-01",

"name":"aa"

]

var result1 = data.reduce((accum, curr) => {

if (!accum[curr.date]) {

return {...accum, [curr.date]: [curr.name] }

}

return {...accum, [curr.date]: [...accum[curr.date], curr.name] }

}, {})

var final = Object.keys(result1).map(date => ({

date: date,

name: result1[date].join(',')

}))

console.log(final)

反對回復 2023-11-02

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減少時未正確打印數組

減少時未正確打印數組

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