Posted By

rolandog on 01/17/07

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object
array

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Last Edited at 01/17/07 09:00pm

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type.of() - a more specific typeof()

/ Published in: JavaScript

Helps identify correctly the type of whatever you put as an argument. This was adapted from http://www.planetpdf.com/developer/article.asp?ContentID=testing_for_object_types_in_ja

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var is={
	Null:function(a){
		return a===null;
	},
	Undefined:function(a){
		return a===undefined;
	},
	nt:function(a){
		return(a===null||a===undefined);
	},
	Function:function(a){
		return(typeof(a)==='function')?a.constructor.toString().match(/Function/)!==null:false;
	},
	String:function(a){
		return(typeof(a)==='string')?true:(typeof(a)==='object')?a.constructor.toString().match(/string/i)!==null:false;
	},
	Array:function(a){
		return(typeof(a)==='object')?a.constructor.toString().match(/array/i)!==null||a.length!==undefined:false;
	},
	Boolean:function(a){
		return(typeof(a)==='boolean')?true:(typeof(a)==='object')?a.constructor.toString().match(/boolean/i)!==null:false;
	},
	Date:function(a){
		return(typeof(a)==='date')?true:(typeof(a)==='object')?a.constructor.toString().match(/date/i)!==null:false;
	},
	HTML:function(a){
		return(typeof(a)==='object')?a.constructor.toString().match(/html/i)!==null:false;
	},
	Number:function(a){
		return(typeof(a)==='number')?true:(typeof(a)==='object')?a.constructor.toString().match(/Number/)!==null:false;
	},
	Object:function(a){
		return(typeof(a)==='object')?a.constructor.toString().match(/object/i)!==null:false;
	},
	RegExp:function(a){
		return(typeof(a)==='function')?a.constructor.toString().match(/regexp/i)!==null:false;
	}
};

var type={
	of:function(a){
		for(var i in is){
			if(is[i](a)){
				return i.toLowerCase();
			}
		}
	}
};

URL: http://rolandog.com/archives/2007/01/18/typeof-a-more-specific-typeof/

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