javascript - 通过过滤连接两个数组

Question

我有两个数组。我需要将它们结合起来并制作一个新数组，其中包含 dayOfWeek 2、3、4、5、6。这意味着 dayOfWeek 的优先级在 中数组 1。意味着需要从 array1 中保留 dayOfWeek 3、4、5。

array1 = [
  {dayOfWeek: 2, home1: "01:30"},
  {dayOfWeek: 3, home1: "02:30"},
  {dayOfWeek: 4, home1: "03:30"},
  {dayOfWeek: 5, home1: "04:30"},
]

array2 = [
  {dayOfWeek: 3, home1: "05:30"},
  {dayOfWeek: 4, home1: "06:30"},
  {dayOfWeek: 5, home1: "07:30"},
  {dayOfWeek: 6, home1: "08:30"},
]

输出应该是

finalArray = [
  {dayOfWeek: 2, home1: "01:30"},
  {dayOfWeek: 3, home1: "02:30"},
  {dayOfWeek: 4, home1: "03:30"},
  {dayOfWeek: 5, home1: "04:30"},
  {dayOfWeek: 6, home1: "08:30"},
]

我试过了，但它从两个数组中推送了 dayOfWeek。我如何过滤它们？

const finalArray = []
array1.map((a) => {
    array2.map((a2) => {
        if (a.dayOfWeek === a2.dayOfWeek) {
          finalArray.push(a)
        }
        if (a.dayOfWeek === a2.dayOfWeek) {
          finalArray.push(a2)
        }
    })
})

提前致谢!!!

Answer 1

您也可以简单地过滤第二个数组以查找第一个数组中缺少的项目，然后将它们连接到第一个数组而不使用 lodash:

const a1 = [ {dayOfWeek: 2, home1: "01:30"}, {dayOfWeek: 3, home1: "02:30"}, {dayOfWeek: 4, home1: "03:30"}, {dayOfWeek: 5, home1: "04:30"}, ]
const a2 = [ {dayOfWeek: 3, home1: "05:30"}, {dayOfWeek: 4, home1: "06:30"}, {dayOfWeek: 5, home1: "07:30"}, {dayOfWeek: 6, home1: "08:30"}, ]

const r = a1.concat(a2.filter(x => !a1.some(y => y.dayOfWeek == x.dayOfWeek)))

console.log(r)

这是通过 Array.concat、Array.filter 和 Array.some 完成的