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As3 verifaricare se una variabile è empty

/ Published in: ActionScript 3
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  1. public static function empty(variable:*) : Boolean {
  2.  
  3. 	var isEmpty:Boolean;
  4.  
  5. 	if (variable == null || variable == undefined) {
  6. 		isEmpty = true;
  7. 	}
  8. 	else if (variable is String) {
  9. 		var str:String = variable.replace(/^\s+|\s+$/g, '');
  10. 		isEmpty = (str.replace(/\s+/g, ' ') == "" || variable == "" || variable == "0" || variable == "false");
  11. 	}
  12. 	else if (variable is Number || variable is int || variable is uint) {
  13. 		isEmpty = (variable == 0);
  14. 	}
  15. 	else if (variable is Array) {
  16. 		isEmpty = (variable.length == 0);
  17. 	}
  18. 	else if (variable is Boolean) {
  19. 		isEmpty = (variable == false);
  20. 	}
  21.  
  22. 	return isEmpty;
  23.  
  24. }

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