我有数组数组，我想要对象数组作为回报，我将如何在 JS 中或使用下划线插件执行此操作

Question

var arr = [
[{a: "apple", b: "ball"}, {c: "cat", d: "dog"}],
[{e: "elephent", f: "flight"}, {g: "god", h: "hen"}]
];

预期结果是——

var exp = [
{a: "apple", b: "ball"}, 
{c: "cat", d: "dog"},
{e: "elephent", f: "flight"}, 
{g: "god", h: "hen"}
]

Answer 1

您可以使用flat()：

var arr = [[{a: "apple", b: "ball"}, {c: "cat", d: "dog"}],[{e: "elephent", f: "flight"}, {g: "god", h: "hen"}]];
console.log(arr.flat());

对于 Microsoft Edge 和 IE，请使用[].concat(...arr)

Answer 2

尝试使用以下代码：

[].concat(...arr)

Answer 3

您可以访问数组的索引0并将其分配给存储数组的现有变量

类似的东西

arr = arr[0]

*由于问题被误读，此答案需要更新

let newArr = []
newArr = arr.map((item) {
return item[0]
})

这使arr保持不变。如果您宁愿修改arr请使用forEach而不是map