Array Protoype | removeValue(value:*)

January 21st, 2010 Marvin Blase

Another prototype I had to use recently and again the Internet didn't provide me any 100% working solution. So here's mine to remove a value in an Array and then automatically change it's keys, so if the value is in the first key everything will move up by one. (0 will be deleted, 1 will be 0 then, 2 -> 1)

I've also written the following Prototypes once:
- remove(index:int) (will be deleting an index and resort)
- insert(index:int, value:*) (will be inserting a key to a specified index and resort)

Example:

PLAIN TEXT

Actionscript:

1. // remove by value
2. var arr:Array = new Array("a", "b", "c", "d");
3. arr = arr.removeValue("b"); // pass the value, not index!
4. trace(arr); // a, c, d

Array.removeValue(value:*):

PLAIN TEXT

Actionscript:

1. Array.prototype.removeValue = function(value:*):Array {
2.     for(var i:int;i <this.length; i++) {
3.         if(this[i] === value) {
4.             var index:int = i;
5.         }
6.     }
7.            
8.     var original:Array = this.slice();
9.     if(!index) {
10.         original.shift();
11.     } else { 
12.         var temp:Array = original.splice(index);
13.         temp.shift();
14.         original = original.concat(temp);
15.     }
16.     return original;
17. };

Posted in Codesnippets 3,078 views

3 Responses to “Array Protoype | removeValue(value:*)”

1. theo_t says:

   26/01/2010 at 5:58 PM

   Why not just use indexOf + splice ?

   Array.prototype.removeValue = function(value:*):Array
   {
   var o:Array = this.slice(),
   i:int = o.indexOf(value);

   if(i > -1) o.splice(i,1);
   return o;
   }
2. Marvin Blase says:

   26/01/2010 at 6:06 PM

   hey theo,
   thanks! doesn't sound bad as well - must admit i haven't checked that yet but will. i guess i was faster writing the prototype than having a look in the livedocs, hehe :)
3. Stephan says:

   25/02/2010 at 5:37 PM

   hi, me again ^^ just wanted to say that i have tested it just and it's working perfect. deletes the index and re-orders the array. thanks!