- var a = { };
- var b = {
- key: "a"
- };
- var c = {
- key: "c"
- };
- a[b] = "123"
- a[c] = "456"
- console.log(a[b]);
输出的结果是 456
因为
对象的键值会转换为字符串 a[b] == a["[object Object]"]
可以打印一下看看结果
console.log(b.toString() == "[object Object]");
和这个结果
console.log(a["[object Object]"]);
对象键值对
来源: http://www.bubuko.com/infodetail-3201727.html