使用字符串访问JS数组对象

Question

var arr ={count:12,total:110};
console.log(arr.count,'',arr.total)   //12 110

但是如何使用这样

var c='count';
console.log(arr.c) //it's not similar to arr.count is there is any way to use this

如何通过引用字符串来访问数组对象？

Answer 1

var c='count';
console.log(arr[c])

您可以使用括号表示法访问键/属性

Answer 2

＆＃13;

＆＃13;

var arr ={count:12,total:110};
var c='count';

console.log(arr[c],'',arr.total)   //12 110

＆＃13;

＆＃13;

＆＃13;

Answer 3

试试这个

var c = arr['count'];