Finding out if the object is an ARRAY type?

Question

Hello Everyone,How can I find out if it is an Array object that is being passed? I usually rely upon the "typeof()" which returns the primitive type. But I am unable to find out if the passed value is an Array. I wrote a simple function which return the type:function getType(p:object){     return typeof(p);}So I then wrote a function with switch statement:function getArray(p:Object){    switch(typeof(p))    {        case 'string':        return "STRING";        break;                case 'boolean':        return "BOOLEAN";        break;                case 'object':        return "OBJECT";        break;    }}  I would highly apprecite your input in this.Thanks you.

kglad · Accepted Answer

use the is operator:if(p is Array){} else if(p is Object){} etc

Greg Dove · Answer

If you want a more generic way to get a string representation of the class type, you can also use flash.utils.describeType:


var test:Array=[new Sprite(),new Array("[array example]"), new Object(),1.45,"hello world"];

function quickDescription(obj:*):String{
    var desc:XML =flash.utils.describeType(obj);
    var type:String=desc.@name;
    if (type.indexOf("::")>-1) type=type.split("::")[1];
    var baseClass:String=desc.@base;
    if (baseClass.length && baseClass.indexOf("::")>-1) baseClass=baseClass.split("::")[1];
    return (baseClass.length? type+" from a base class of "+baseClass : type);
}
for each(var item:Object in test) trace (item +" is "+quickDescription(item))
/* outputs:
[object Sprite] is Sprite from a base class of DisplayObjectContainer
[array example] is Array from a base class of Object
[object Object] is Object
1.45 is Number from a base class of Object
hello world is String from a base class of Object
*/

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