[英]Lodash: how to group using multiple nested properties?
嘗試使用2個對象的嵌套屬性對數組進行分組。 以下是我正在使用的數據。 我需要使用嵌套在time
對象中的start
和end
屬性對數據進行分組
`
[{
"id": 227,
"day": 0,
"time": {
"id": 31,
"start": "03:00:00",
"end": "06:00:00"
},
"max_tasks": 3
}, {
"id": 228,
"day": 1,
"time": {
"id": 31,
"start": "03:00:00",
"end": "06:00:00"
},
"max_tasks": 3
}, {
"id": 229,
"day": 2,
"time": {
"id": 31,
"start": "03:00:00",
"end": "06:00:00"
},
"max_tasks": 3
}, {
"id": 230,
"day": 3,
"time": {
"id": 31,
"start": "03:00:00",
"end": "06:00:00"
},
"max_tasks": 3
}, {
"id": 231,
"day": 4,
"time": {
"id": 31,
"start": "03:00:00",
"end": "06:00:00"
},
"max_tasks": 3
}, {
"id": 232,
"day": 5,
"time": {
"id": 31,
"start": "03:00:00",
"end": "06:00:00"
},
"max_tasks": 3
}, {
"id": 233,
"day": 6,
"time": {
"id": 31,
"start": "03:00:00",
"end": "06:00:00"
},
"max_tasks": 3
}, {
"id": 283,
"day": 0,
"time": {
"id": 39,
"start": "06:00:00",
"end": "08:00:00"
},
"max_tasks": 3
}, {
"id": 284,
"day": 1,
"time": {
"id": 39,
"start": "06:00:00",
"end": "08:00:00"
},
"max_tasks": 3
}, {
"id": 285,
"day": 2,
"time": {
"id": 39,
"start": "06:00:00",
"end": "08:00:00"
},
"max_tasks": 3
}, {
"id": 286,
"day": 3,
"time": {
"id": 39,
"start": "06:00:00",
"end": "08:00:00"
},
"max_tasks": 3
}, {
"id": 287,
"day": 4,
"time": {
"id": 39,
"start": "06:00:00",
"end": "08:00:00"
},
"max_tasks": 3
}, {
"id": 288,
"day": 5,
"time": {
"id": 39,
"start": "06:00:00",
"end": "08:00:00"
},
"max_tasks": 3
}, {
"id": 289,
"day": 6,
"time": {
"id": 39,
"start": "06:00:00",
"end": "08:00:00"
},
"max_tasks": 3
}]
`
目前,我可以使用以下代碼使用一個屬性進行分組,但不能同時使用兩者:
var result = _.groupBy(this.slots, 'time.start')
預期數據可能如下所示:
03: 00: 00 - 06: 00: 00: [{
"id": 227,
"day": 0,
"time": {
"id": 31,
"start": "03:00:00",
"end": "06:00:00"
},
"max_tasks": 3
},
{
"id": 228,
"day": 1,
"time": {
"id": 31,
"start": "03:00:00",
"end": "06:00:00"
},
"max_tasks": 3
}
]
06: 00: 00 - 08: 00: 00: [{
"id": 283,
"day": 0,
"time": {
"id": 39,
"start": "06:00:00",
"end": "08:00:00"
},
"max_tasks": 3
},
{
"id": 284,
"day": 1,
"time": {
"id": 39,
"start": "06:00:00",
"end": "08:00:00"
},
"max_tasks": 3
}
]
`
提前致謝 :)
您可以使用reduce
函數對這些值進行分組。
let arr = [{ "id": 227, "day": 0, "time": { "id": 31, "start": "03:00:00", "end": "06:00:00" }, "max_tasks": 3}, { "id": 228, "day": 1, "time": { "id": 31, "start": "03:00:00", "end": "06:00:00" }, "max_tasks": 3}, { "id": 229, "day": 2, "time": { "id": 31, "start": "03:00:00", "end": "06:00:00" }, "max_tasks": 3}, { "id": 230, "day": 3, "time": { "id": 31, "start": "03:00:00", "end": "06:00:00" }, "max_tasks": 3}, { "id": 231, "day": 4, "time": { "id": 31, "start": "03:00:00", "end": "06:00:00" }, "max_tasks": 3}, { "id": 232, "day": 5, "time": { "id": 31, "start": "03:00:00", "end": "06:00:00" }, "max_tasks": 3}, { "id": 233, "day": 6, "time": { "id": 31, "start": "03:00:00", "end": "06:00:00" }, "max_tasks": 3}, { "id": 283, "day": 0, "time": { "id": 39, "start": "06:00:00", "end": "08:00:00" }, "max_tasks": 3}, { "id": 284, "day": 1, "time": { "id": 39, "start": "06:00:00", "end": "08:00:00" }, "max_tasks": 3}, { "id": 285, "day": 2, "time": { "id": 39, "start": "06:00:00", "end": "08:00:00" }, "max_tasks": 3}, { "id": 286, "day": 3, "time": { "id": 39, "start": "06:00:00", "end": "08:00:00" }, "max_tasks": 3}, { "id": 287, "day": 4, "time": { "id": 39, "start": "06:00:00", "end": "08:00:00" }, "max_tasks": 3}, { "id": 288, "day": 5, "time": { "id": 39, "start": "06:00:00", "end": "08:00:00" }, "max_tasks": 3}, { "id": 289, "day": 6, "time": { "id": 39, "start": "06:00:00", "end": "08:00:00" }, "max_tasks": 3}] let result = arr.reduce((a, c) => { let key = `${c.time.start} - ${c.time.end}`; (a[key] || (a[key] = [])).push(c); return a; }, {}); console.log(result);
.as-console-wrapper { max-height: 100% !important; top: 0; }
將_.groupBy()
與回調一起使用,並從start
和end
生成密鑰:
const data = [{"id":227,"day":0,"time":{"id":31,"start":"03:00:00","end":"06:00:00"},"max_tasks":3},{"id":228,"day":1,"time":{"id":31,"start":"03:00:00","end":"06:00:00"},"max_tasks":3},{"id":229,"day":2,"time":{"id":31,"start":"03:00:00","end":"06:00:00"},"max_tasks":3},{"id":230,"day":3,"time":{"id":31,"start":"03:00:00","end":"06:00:00"},"max_tasks":3},{"id":231,"day":4,"time":{"id":31,"start":"03:00:00","end":"06:00:00"},"max_tasks":3},{"id":232,"day":5,"time":{"id":31,"start":"03:00:00","end":"06:00:00"},"max_tasks":3},{"id":233,"day":6,"time":{"id":31,"start":"03:00:00","end":"06:00:00"},"max_tasks":3},{"id":283,"day":0,"time":{"id":39,"start":"06:00:00","end":"08:00:00"},"max_tasks":3},{"id":284,"day":1,"time":{"id":39,"start":"06:00:00","end":"08:00:00"},"max_tasks":3},{"id":285,"day":2,"time":{"id":39,"start":"06:00:00","end":"08:00:00"},"max_tasks":3},{"id":286,"day":3,"time":{"id":39,"start":"06:00:00","end":"08:00:00"},"max_tasks":3},{"id":287,"day":4,"time":{"id":39,"start":"06:00:00","end":"08:00:00"},"max_tasks":3},{"id":288,"day":5,"time":{"id":39,"start":"06:00:00","end":"08:00:00"},"max_tasks":3},{"id":289,"day":6,"time":{"id":39,"start":"06:00:00","end":"08:00:00"},"max_tasks":3}] const result = _.groupBy(data, ({ time: { start, end } }) => `${start} - ${end}`) console.log(result)
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