我正在尝试找到一种方法将以下对象数组转换为 JSON
原始格式
const arr = [
{
userid: '1000080542',
photoname: '2c8a4709-ed7e-00a50-0da4ead1de55118-f3-1473281639’,
datetime: ‘2020-01-24T20:46:05+11:00’
},
{
userid: '1000081532',
photoname: '73321038-c8bf-57c6e-5d803cd0a920e9a-95-1487447082',
datetime: ‘2020-01-24T20:46:05+11:00’
},
{
userid: '1000081532',
photoname: '5c00bc65-db1b-7a394-dd65b462b9e75e2-c5-1487447019',
datetime: ‘2020-01-24T20:46:05+11:00’
},
{
userid: '1000081532',
photoname: '986ee1e2-2f8e-bf070-0d70d2e67537835-e2-1473821119',
datetime: ‘2020-01-24T20:46:05+11:00’
},
{
userid: '1000081532',
photoname: '09f7cde6-68c8-f462d-c01f7713a2c747f-eb-1474294185',
datetime: ‘2020-01-24T20:46:05+11:00’
}
]
转换格式
{
1000080542: {
'2c8a4709-ed7e-00a50-0da4ead1de55118-f3-1473281639': '2020-01-24T20:46:05+11:00',
'73321038-c8bf-57c6e-5d803cd0a920e9a-95-1487447082': '2020-01-24T20:46:05+11:00'
},
1000081532: {
'5c00bc65-db1b-7a394-dd65b462b9e75e2-c5-1487447019'': '2020-01-24T20:46:05+11:00',
'986ee1e2-2f8e-bf070-0d70d2e67537835-e2-1473821119': '2020-01-24T20:46:05+11:00',
'09f7cde6-68c8-f462d-c01f7713a2c747f-eb-1474294185': '2020-01-24T20:46:05+11:00'
}
}
我一直在尝试这些方法,但我很失败
obj = arr.reduce((h, y) => {
Object.keys(y).forEach(k => {
if (!h[k]) {
h[k] = []
h[k].push(y[k])
} else if (!h[k].includes(y[k])) h[k].push(y[k])
})
return h
}, {})
console.log(obj)
谢谢
答案 0 :(得分:1)
const arr = [
{
userid: '1000080542',
photoname: '2c8a4709-ed7e-00a50-0da4ead1de55118-f3-1473281639',
datetime: '2020-01-24T20:46:05+11:00'
},
{
userid: '1000081532',
photoname: '73321038-c8bf-57c6e-5d803cd0a920e9a-95-1487447082',
datetime: '2020-01-24T20:46:05+11:00'
},
{
userid: '1000081532',
photoname: '5c00bc65-db1b-7a394-dd65b462b9e75e2-c5-1487447019',
datetime: '2020-01-24T20:46:05+11:00'
},
{
userid: '1000081532',
photoname: '986ee1e2-2f8e-bf070-0d70d2e67537835-e2-1473821119',
datetime: '2020-01-24T20:46:05+11:00'
},
{
userid: '1000081532',
photoname: '09f7cde6-68c8-f462d-c01f7713a2c747f-eb-1474294185',
datetime: '2020-01-24T20:46:05+11:00'
}
];
console.log(
arr.reduce((accumulator, element) => {
if (!accumulator[element.userid]) accumulator[element.userid] = {};
accumulator[element.userid][element.photoname] = element.datetime;
return accumulator;
}, {})
);
如果我正确理解您的输出示例,您希望将顶级键设为用户 ID,并将内容设为照片名称到日期时间的键值对。
所以你只需要把userid放在输出对象中作为key,一个子对象作为值,然后把photonames和datetime放在子对象中。
答案 1 :(得分:0)
您可以将 reduce
与对象一起使用来存储每个 ID 的值。
const arr = [
{
userid: '1000080542',
photoname: '2c8a4709-ed7e-00a50-0da4ead1de55118-f3-1473281639',
datetime: '2020-01-24T20:46:05+11:00'
},
{
userid: '1000081532',
photoname: '73321038-c8bf-57c6e-5d803cd0a920e9a-95-1487447082',
datetime: '2020-01-24T20:46:05+11:00'
},
{
userid: '1000081532',
photoname: '5c00bc65-db1b-7a394-dd65b462b9e75e2-c5-1487447019',
datetime: '2020-01-24T20:46:05+11:00'
},
{
userid: '1000081532',
photoname: '986ee1e2-2f8e-bf070-0d70d2e67537835-e2-1473821119',
datetime: '2020-01-24T20:46:05+11:00'
},
{
userid: '1000081532',
photoname: '09f7cde6-68c8-f462d-c01f7713a2c747f-eb-1474294185',
datetime: '2020-01-24T20:46:05+11:00'
}
];
const res = arr.reduce((acc,{userid,photoname,datetime})=>{
(acc[userid] = acc[userid] || {})[photoname] = datetime;
return acc;
}, {});
console.log(res);