javascript - 如何使用字符串访问 javascript 对象？

Question

这个问题已经有答案了:

Accessing an object property with a dynamically-computed name (19 个回答)

已关闭 9 年前。

有人知道如何使用字符串来访问 JavaScript 对象吗？我需要使用 var/string 来访问 javascript 对象。

++ 这个问题已得到解答 - 请参阅 JSFiddle 进行修复++

var answers = {"A":0,"B":0,"C":0,"D":0};

var abcd = $(this).attr("data-filter"); //this is equal to A
var answer_select = "answers."+abcd;    //this is equal to answers.A

answer_select=20; //does not change the value.
//if i write..
answers.A=20; //it works

//I need to use the variable "answer_select" as this changes each time..

我在这里设置了一个jsfiddle..
http://jsfiddle.net/jstleger0/h3SEX/6/

Answer 1

使用这个语法:varanswer_select=answers[abcd];