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Check functions jQuery extension

/ Published in: jQuery
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Hi, all, this is the "checkFunction" extension for jQuery.

This extension takes two parameters:

1. fPointer
This parameter is the "possible" function to check

1.1 This parameter can be a String that is a function pointer
ex:"editUser"

1.2 This parameter can be a function
ex: function(idUser){alert('Edit User '+idUser);}

1.3 This parameter can be a String that is a function body
ex: "alert('Edit User');"

2. lastFpPointer
This parameter is the function by default if the fpPointer is not a valid function

2.1 This parameter must be a function
ex: function(){}

This extension makes possibles to get any possible representation of a function and detect if it exist.

If it exist return it like a correct function.

If doesn't exist the default function will be returned.

The use of this extension:

Examples:


- jQuery.checkFunction("EditUser", function(){});

returns EditUser



- jQuery.checkFunction("EditUser ();alert('Edit Launched');", function(){});

returns function(){EditUser ();alert('Edit Launched');}



- jQuery.checkFunction(EditUser, function(){});

returns EditUser



Thanks.

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Copy this code and paste it in your HTML 
  1. jQuery.extend(jQuery, {
  2. 	checkFunction: function(fPointer, lastFpPointer){
  3. 		var newFunction = false;
  4. 		if(jQuery.isFunction(fPointer)){
  5. 			newFunction = fPointer;
  6. 		}else if (/\(.*\)/igm.test(fPointer)){
  7. 			newFunction = new Function(fPointer);
  8. 		}else{
  9. 			try{
  10. 				var mayBeFunction = (eval(fPointer));
  11. 				if(jQuery.isFunction(mayBeFunction)){
  12. 					newFunction = mayBeFunction;
  13. 				}else{
  14. 					newFunction = lastFpPointer;
  15. 				}
  16. 			}catch(e){
  17. 				newFunction =lastFpPointer;
  18. 			}
  19. 		}
  20. 		return newFunction;
  21. 	});

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