怎么实现这个功能

Question

aa.prototype={
    main:function(j){
        this.j();//这句错误
    }
    other:function(){}
}

怎么可以使aa('other')可以调用other方法

Answer 1

var a = function() {};
a.prototype = {
    main: function(j){
        this[j]();
    },
    other: function(){
        console.log('test');
    }
};
var b = new a();
b.main('other');

Answer 2

aa['other']()