Advanced Search

javascript function argument handling

/ Published in: JavaScript
Save to your folder(s)
/*
* A little help function for when I'm creating functions
*
* When I pluck values from function arguments I tend to
* write content of this function repeatedly.
*
* e.g.
* a = arguments
* this.id = arg(a, 0)
* this.name = arg(a, 3)
*
* this.id == 6
* this.name == null
*/

Expand | Embed | Plain Text

Copy this code and paste it in your HTML 
  1. /*
  2.  * A little help function for when I'm creating functions
  3.  * 
  4.  * When I pluck values from function arguments I tend to
  5.  * write content of this function repeatedly.
  6.  * 
  7.  * e.g.
  8.  * a = arguments
  9.  * this.id = arg(a, 0)
  10.  * this.name = arg(a, 3)
  11.  * 
  12.  * this.id == 6
  13.  * this.name == null
  14.  */
  15. function arg(_a, ia, def, returnArray) {
  16. 	var v = null
  17.  
  18. 	// if ia is an array, find the
  19. 	// first correct definition
  20. 	if (ia.constructor  == Array) {
  21. 		/*
  22. 		 * Each item is checked. if the
  23. 		 * item in the array is
  24. 		 * a definition within the oaet 
  25. 		 * arguments or object - pass it 
  26. 		 */
  27. 		for(var i=0; i<ia.length; i++) {
  28. 			if(_a[ia[i]]){
  29.  
  30. 				 v = _a[ia[i]];
  31. 				break;
  32. 			}
  33. 		}
  34. 	}
  35. 	else {
  36. 		// if ia is just a value
  37. 		if(_a[ia]) v = _a[ia];
  38. 	}
  39.  
  40. 	if( (v == null) && (def != undefined) ) {
  41. 		v = def
  42. 	}  
  43.  
  44. 	if(returnArray){
  45. 		return [v, ia[i]]
  46. 	}
  47. 	else
  48. 	{
  49. 		return v
  50. 	}
  51.  
  52. }

Report this snippet


Comments

RSS Icon Subscribe to comments

You need to login to post a comment.