获取JavaScript变量的类型（Finding Out Class Names of JavaScript Objects）

核心提示： 输出如下：CodeInteger:42-toString()returns:42-typeof()returns:number-getObjectClass()returns:NumberBoolean:true-toString()returns:true-typeof()returns

输出如下：

Code

Integer:42
-toString()returns:42
-typeof()returns:number
-getObjectClass()returns:Number
Boolean:true
-toString()returns:true
-typeof()returns:boolean
-getObjectClass()returns:Boolean
String:"HelloWorld!"
-toString()returns:HelloWorld!
-typeof()returns:string
-getObjectClass()returns:String
Function:MyClass
-toString()returns:functionMyClass(){}
-typeof()returns:function
-getObjectClass()returns:Function
Regularexpression:/Matchthis!/
-toString()returns:/Matchthis!/
-typeof()returns:object
-getObjectClass()returns:RegExp
Intrinsicobject:document
-toString()returns:[object]
-typeof()returns:object
-getObjectClass()returns:undefined
Arrayobject:newArray(1,2,3)
-toString()returns:1,2,3
-typeof()returns:object
-getObjectClass()returns:Array
Dateobject:newDate()
-toString()returns:TueAug1917:32:34UTC+08002008
-typeof()returns:object
-getObjectClass()returns:Date
Objectobject:newObject()
-toString()returns:[objectObject]
-typeof()returns:object
-getObjectClass()returns:Object
MyClassobject:newMyClass()
-toString()returns:[objectObject]
-typeof()returns:object
-getObjectClass()returns:MyClass

我们可以看到，typeof 方法在数组、对象、自定义类型对象 的测试中，都只能返回“object”，而getObjectClass 方法则会获得真正的类型名称。

出处：http://blodfox777.cnblogs.com/