我觉得这是一个非常简单的答案，但我很难弄清楚。
我想转动这个对象数组：
[{
client: 'lalala@email.com',
amount: 0,
date: '2018-12'
},
{
client: 'lalala@email.com',
amount: '30',
date: '2018-11'
}, {
client: 'lalala@email.com',
amount: '5',
date: '2018-10'
}]
进入这个：
[{
client: 'lalala@email.com',
'2018-12': 0,
'2018-11': '30',
'2018-10': '5'
}]
我一直在尝试使用 reduce（） 函数，但没有接近。
感谢您抽出宝贵时间。
reduce是正确的方法 - 这是怎么做的：
const data = [{
client: 'lalala@email.com',
amount: 0,
date: '2018-12'
},
{
client: 'lalala@email.com',
amount: '30',
date: '2018-11'
}, {
client: 'lalala@email.com',
amount: '5',
date: '2018-10'
}]
const result = data.reduce((memo, {client, date, amount}) => {
memo.client = client;
memo[date] = amount;
return memo;
}, {});
console.log(result)由于客户端将始终相同，因此您可以在reduce()中Object.assign做好工作：
const data = [{client: 'lalala@email.com',amount: 0,date: '2018-12'},{client: 'lalala@email.com',amount: '30',date: '2018-11'}, {client: 'lalala@email.com',amount: '5',date: '2018-10'}]
const result = data.reduce((obj, {client, date, amount}) =>
Object.assign(obj, {client, [date]:amount}), {});
console.log([result])使用Array.prototype.reduce这将起作用：
const a = [{
client: 'lalala@email.com',
amount: 0,
date: '2018-12'
}, {
client: 'lalala@email.com',
amount: '30',
date: '2018-11'
}, {
client: 'lalala@email.com',
amount: '5',
date: '2018-10'
}]
const b = a.reduce((acc, {date, amount}) => {
return { ...acc, [date]: amount }
}, { client: a[0].client })
console.log([b])