为什么我收到“未定义”消息？

Question

I have defined a object in a js file:我在 js 文件中定义了一个对象：

myobj.js myobj.js

MyObj={
  test: {
     startTest: function(){
         var x = SOME_PROCESS_A;
         var y = SOME_PROCESS_B;
         return {x: x, y: y};
     }
  }
}

In another js file I call this object function:在另一个 js 文件中，我调用了这个对象函数：

other.js其他.js

var mytest = MyObj.test.startTest
var a = mytest.x;
var b = mytest.y;

my index.html:我的 index.html：

<body>
 <script src="myobj.js"></script>
 <script src="other.js"></script>
</body>

I got the error from firebug in other.js , " mytest " is undfined in the line " var a = mytest.x; " Why??我从萤火误差在other.js，“ mytest ”在行undfined“ var a = mytest.x; ”为什么？

Thank you,all.谢谢你们。 I got another "undefined" problem in the similar code, please check here我在类似的代码中遇到了另一个“未定义”问题，请在此处查看

Answer 1

你忘记调用函数了：

var mytest = MyObj.test.startTest()

Answer 2

becouse mytest is a function object, and there are no properties defined in it.因为 mytest 是一个函数对象，其中没有定义任何属性。

you can either call it like你可以这样称呼它

MyObj.test.startTest();

or rewrite your object something like:或重写您的对象，例如：

MyObj={
  test: {
     startTest: function(){
         this.x = SOME_PROCESS_A;
         this.y = SOME_PROCESS_B;
         return {x: this.x, y: this.y};
     }
  }
}

Answer 3

I think you meant to do我想你的意思是

var mytest = MyObj.test.startTest(); //calls the function and returns the value to mytest

and not并不是

var mytest = MyObj.test.startTest;//assigns the function to mytest

为什么我收到“未定义”消息？

问题描述

3 个解决方案

解决方案1
3 2011-04-18 07:39:59

解决方案2
1 2011-04-18 07:40:25

解决方案3
1 已采纳 2011-04-18 07:41:13

为什么我收到“未定义”消息？

问题描述

3 个解决方案

解决方案1 3 2011-04-18 07:39:59

解决方案2 1 2011-04-18 07:40:25

解决方案3 1 已采纳 2011-04-18 07:41:13

解决方案1
3 2011-04-18 07:39:59

解决方案2
1 2011-04-18 07:40:25

解决方案3
1 已采纳 2011-04-18 07:41:13