如何在JavaScript中将对象{}转换为键值对数组[]

Question

我要转换如下所示的对象：

{"1":5,"2":7,"3":0,"4":0,"5":0,"6":0,"7":0,"8":0,"9":0,"10":0,"11":0,"12":0}

键值对的数组，如下所示：

[[1,5],[2,7],[3,0],[4,0]...].

如何在JavaScript中将对象转换为键值对数组？

Answer 1

对象。entries（）返回一个数组，其元素是与直接在对象上找到的可枚举属性[key，value]对对应的数组。属性的顺序与手动循环对象的属性值所给出的顺序相同。

^{-https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries#Description}

对象。entries函数返回的输出几乎与您要求的输出完全相同，只是键是字符串而不是数字。

const obj = {"1":5,"2":7,"3":0,"4":0,"5":0,"6":0,"7":0,"8":0,"9":0,"10":0,"11":0,"12":0};

console.log(Object.entries(obj));

Answer 2

最好的方法是：

var obj = {"1":5,"2":7,"3":0,"4":0,"5":0,"6":0,"7":0,"8":0,"9":0,"10":0,"11":0,"12":0}
var result = Object.entries(obj);

console.log(result);

Answer 3

你可以使用Object.keys（）和map（）

js lang-js prettyprint-override">var obj = {"1":5,"2":7,"3":0,"4":0,"5":0,"6":0,"7":0,"8":0,"9":0,"10":0,"11":0,"12":0}
var result = Object.keys(obj).map((key) => [Number(key), obj[key]]);

console.log(result);