我有来自 API 的以下数据结构,它以数组的形式出现Data
,每个Data
元素间隔 1 小时。
interface Data {
time_bucket: string // ISO8601 string
aggregated_value: number // 0 and up
}
我的计划是对其进行格式化,使其与 d3 一起绘制为条形图。条形图有一个选择器,您可以将数据分组为week
、day
、month
和year
。我决定创建一个名为groupBy
lodash 的函数groupBy
。它将数据分组到您想要的指定组。这是功能
export function groupBy<T, K extends keyof any> (list: T[], criteria: (item: T) => K): Record<K, T[]> {
return list.reduce<Record<K, T[]>>((prev, curr) => {
const group = criteria(curr)
// eslint-disable-next-line
if (!prev[group]) {
prev[group] = []
}
prev[group].push(curr)
return prev
// eslint-disable-next-line
}, {} as Record<K, T[]>)
}
问题是图形的x比例是按YYYY-MM-DD
格式构建的。我想将数据分组到每一天,同时将日期格式保持为YYYY-MM-DD
. 我现在从运行该函数中得到的结果在代码片段中如下所示。
const data = [
{
time_bucket: '2021-06-01T16:00:00.000Z',
aggregated_value: 20
},
{
time_bucket: '2021-06-01T18:00:00.000Z',
aggregated_value: 20
},
{
time_bucket: '2021-06-02T16:00:00.000Z',
aggregated_value: 40
},
{
time_bucket: '2021-06-02T20:00:00.000Z',
aggregated_value: 40
},
{
time_bucket: '2021-06-03T05:00:00.000Z',
aggregated_value: 60
}
]
function groupBy(list, criteria) {
return list.reduce((prev, curr) => {
const group = criteria(curr)
if (!prev[group]) {
prev[group] = []
}
prev[group].push(curr)
return prev
}, {})
}
console.log(groupBy(data, (item) => dayjs.utc(item.time_bucket).get('date')))
<script src="https://unpkg.com/dayjs@1.8.21/dayjs.min.js"></script>
<script src="https://unpkg.com/dayjs@1.8.21/plugin/utc.js"></script>
<script>dayjs.extend(window.dayjs_plugin_utc)</script>
您可以看到输出如下所示:
{
"1": [
{
"time_bucket": "2021-06-01T16:00:00.000Z",
"aggregated_value": 20
},
{
"time_bucket": "2021-06-01T18:00:00.000Z",
"aggregated_value": 20
}
],
"2": [
{
"time_bucket": "2021-06-02T16:00:00.000Z",
"aggregated_value": 40
},
{
"time_bucket": "2021-06-02T20:00:00.000Z",
"aggregated_value": 40
}
],
"3": [
{
"time_bucket": "2021-06-03T05:00:00.000Z",
"aggregated_value": 60
}
]
}
这就是我想要的
{
"2021-06-01": [
{
"time_bucket": "2021-06-01T16:00:00.000Z",
"aggregated_value": 20
},
{
"time_bucket": "2021-06-01T18:00:00.000Z",
"aggregated_value": 20
}
],
"2021-06-02": [
{
"time_bucket": "2021-06-02T16:00:00.000Z",
"aggregated_value": 40
},
{
"time_bucket": "2021-06-02T20:00:00.000Z",
"aggregated_value": 40
}
],
"2021-06-03": [
{
"time_bucket": "2021-06-03T05:00:00.000Z",
"aggregated_value": 60
}
]
}
我希望从函数中能够将数据分组到指定的范围内,同时仍然保持格式中的日期YYYY-MM-DD
格式,以便我仍然将其映射到d3
我生成的 x 比例。是否有任何功能dayjs
可以做到这一点,或者是否有任何解决方法。非常感谢您的回复。