变量名称作为Javascript中的字符串 [英] Variable name as a string in Javascript

问题描述

有没有办法在Javascript中将变量名称作为字符串？ （比如Cocoa中的NSStringFromSelector）

我想这样做：

  var myFirstName ='John'; 
 alert（variablesName（myFirstName）+：+ myFirstName）; 
 
  - > myFirstName：John 
  

- 已添加<​​/ p>

我正在尝试使用JavaScript连接浏览器和其他程序。我想将实例名称从浏览器发送到另一个程序以获得回调方法。

  FooClass = function（）{}; 
 FooClass.someMethod = function（json）{
 //做点什么
} 
 
 instanceA = new FooClass（）; 
 instanceB = new FooClass（）; 
 doSomethingInAnotherProcess（instanceB）; //结果将被使用instanceB.someMethod（）; 
  

....

[来自另一个程序]

  evaluateJavascriptInBrowser（（instanceName）.someMethod（resultA）;）; 
  

在PHP中：
如何在PHP中将变量名称作为字符串？

解决方案

通常，您可以将哈希表用于要将名称映射到某个值的情况，并且能够检索两者。

  var obj = {myFirstName：'John'}; obj.foo = '另一个名字'; for（key in obj）console.log（key +'：'+ obj [key]）;  

Is there a way to get a variable name as a string in Javascript? (like NSStringFromSelector in Cocoa)

I would like to do like this:

var myFirstName = 'John';
alert(variablesName(myFirstName) + ":" + myFirstName);

--> myFirstName:John

-- added

I'm trying to connect a browser and another program using JavaScript. I would like to send instance names from a browser to another program for callback method.

FooClass = function(){};
FooClass.someMethod = function(json) {
  // Do something
}

instanceA = new FooClass();
instanceB = new FooClass();
doSomethingInAnotherProcess(instanceB); // result will be substituted by using instanceB.someMethod();

....

[From another program]

evaluateJavascriptInBrowser("(instanceName).someMethod("resultA");");

In PHP: How to get a variable name as a string in PHP?

解决方案

Typically, you would use a hash table for a situation where you want to map a name to some value, and be able to retrieve both.

var obj = { myFirstName: 'John' };
obj.foo = 'Another name';
for(key in obj)
    console.log(key + ': ' + obj[key]);

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