将数组转为对象，并从另一个 object 添加键值

Question

我有两个相同长度的 arrays：

一个简单的数组

arr1 = [1,2,3]

和另一个对象数组

arr2 = [
  {cat: "a", other: 0},
  {cat: "b". other: 0},
  {cat: "c", other: 0}
]

我想将两个 arrays 组合成一个新数组，从第一个数组中获取值并为它们提供键node ，并将所有cat组合如下：

end = [
 {node: 1, cat: "a"},
 {node: 2, cat: "a"},
 {node: 3, cat: "a"},
]

Answer 1

 arr2 = [ {cat: "a", other: 0}, {cat: "b", other: 0}, {cat: "c", other: 0} ]; arr1 = [1,2,3]; let res = []; for (let i=0; i<arr1.length; i++) { res.push({node: arr1[i], cat: arr2[i].cat}); } console.log(res);

Answer 2

您可以通过它 map 构建数组并同时创建新对象

这个将所有对象合并在一起

    arr1.map((value, idx) => ({ ...arr2[idx], node: value }))

如果你只想得到 arr2 的猫，那么就这样做

    arr1.map((value, idx) => ({ cat: arr2[idx].cat, node: value }))

 arr1 = [1,2,3]; arr2 = [ {cat: "a", other: 0}, {cat: "b", other: 0}, {cat: "c", other: 0} ]; end = arr1.map((value, idx) => ({ cat: arr2[idx].cat, node: value })); console.log(end)