我的价格/日期数据的形式为[日期，价格]
let priceData = [
[1551052800000, 0.33739737955243454]
[1551139200000, 0.33628886196814234]
[1551225600000, 0.12674156277665535]
[1551312000000, 0.16847247989576378]
[1557792000000, 0.5650889670671049]
[1557878400000, 0.6003006017008962]
[1557964800000, 0.6438789432408669]
[1558051200000, 0.6684895789112406]
]
我想知道一种干净的方法来使用 lodash 或 map 或其他东西获取这样的列表，并根据相同的日期将其组合起来，例如......
// the data below may not be accurate, the point here is the structure
let exampleChuckedData = [
[
[1551052800000, 0.33739737955243454]
[1551139200000, 0.33628886196814234]
[1551225600000, 0.12674156277665535]
[1551312000000, 0.16847247989576378]
]
[
[1557792000000, 0.5650889670671049]
[1557878400000, 0.6003006017008962]
[1557964800000, 0.6438789432408669]
[1558051200000, 0.6684895789112406]
]
]
// Or more conceptually
// Grouped by same date
let exampleConceptData = [
[
['01/01/2019', 0.33739737955243454]
['01/01/2019', 0.33628886196814234]
['01/01/2019', 0.12674156277665535]
['01/01/2019', 0.16847247989576378]
]
[
['01/02/2019', 0.5650889670671049]
['01/02/2019', 0.6003006017008962]
['01/02/2019', 0.6438789432408669]
['01/02/2019', 0.6684895789112406]
]
]
我使用 moment 来满足我所有的日期格式化需求。也许有一种方法可以集成 moment 来帮助解决这个问题，就像他们的 *.isSame()
最佳答案
您可以使用_.groupBy()，并在回调中使用moment(date).day()将每个日期转换为一天。使用 _.values() 将组的对象转换为数组:
const priceData = [[1551052800000,0.33739737955243454],[1551139200000,0.33628886196814234],[1551225600000,0.12674156277665535],[1551312000000,0.16847247989576378],[1557792000000,0.5650889670671049],[1557878400000,0.6003006017008962],[1557964800000,0.6438789432408669],[1558051200000,0.6684895789112406]]
const result = _.values(_.groupBy(priceData, ([d]) => moment(d).startOf('day')
))
console.log(result)<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.14/lodash.js"></script>关于javascript - 使用 Moment 按天合并每小时日期列表，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/57030509/