將數組轉為對象，並從另一個 object 添加鍵值

Question

我有兩個相同長度的 arrays：

一個簡單的數組

arr1 = [1,2,3]

和另一個對象數組

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

我想將兩個 arrays 組合成一個新數組，從第一個數組中獲取值並為它們提供鍵node ，並將所有cat組合如下：

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

您可以通過它 map 構建數組並同時創建新對象

這個將所有對象合並在一起

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

如果你只想得到 arr2 的貓，那么就這樣做

    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)