javascript - Push方法插入嵌套记录

Question

我有两个数组对象，想要合并它们。但由于某种原因，它被插入到第一个数组的下一层

let first = [{name:'a'},{name:'b'}];
let first2 = [{name:'aa'},{name:'bb'}];
first.push(first2);

现在如果我打印第一个对象，它会给出以下输出

[{name: "a"},{name: "b"},[ {name: "aa"}, {name: "bb"}]]

而我需要这个输出[ {name: "a"}, {name: "b"}, {name: "aa"}, {name: "bb"}]

Answer 1

Spread first2 数组来推送项目而不是整个数组:

let first = [{name:'a'},{name:'b'}];
let first2 = [{name:'aa'},{name:'bb'}];
first.push(...first2);

console.log(first);