Javascript:将字符串解释为对象引用？

Question

Possible Duplicate:
Javascript use variable as object name

如何让 JS 将字符串视为对先前定义的对象的引用？简化:

var myObject = new MyObject();

var myString = "myObject";

var wantThisToWork = myString.myproperty;

Answer 1

如果变量在全局范围内，则可以将其作为全局对象的属性进行访问

var a = "hello world";
var varName = "a";
console.log( window[varName] ); // outputs hello world
console.log( this[varName] ); // also works (this === window) in this case

但是，如果它是局部变量，唯一的方法是使用 eval ( disclaimer )

function () {
  var a = "hello world";
  var varName = "a";
  console.log( this[varName] ); // won't work
  console.log( eval(varName) ); // Does work
}

除非您可以将动态变量放入对象中并像属性一样访问它

function () {
  var scope = {
    a: "hello world";
  };
  var varName = "a";
  console.log( scope[varName] ); // works
}