Flex Tip of the Day: varargs in AS3

Before I leave for my trip, I thought I’d post another tip in my series of tips for Flex beginners …

varargs in AS3

Did you know that just like the varargs functionality in Java you could define an ActionScript function so that it takes a variable number of arguments?

You can do this using two approaches: arguments object or … (rest) parameter I am giving a brief example of the … (rest) parameter approach here, you can read in detail about both approaches in this article on Livedocs

// Here's a bare bone example:

            private function average(... args):Number{
               var sum:Number = 0;
               for(var i:int = 0; i<args.length;i++){
                       sum += args[i];
               }
               return sum/args.length;
            }

// Now all the below calls would work

               var a:Number = average(100,200);
               a = average(100,200,300);
               a = average(100,200,300,400);
               a = average(100,200,300,400,500);

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Published:
07.19.07 / 7pm
Category:
Flex, Flex Tips, RIA