Arbitrary number of parameters in AS3

Question

Does ActionScript 3.0 offer any means to accept an arbitrary number of parameters? I usually use .NET, but I have to use AS3 for the project, and something like the blah functions (params double [] x) would be awesome for the helper library.

thanks

Answer 1

Check the break parameter: http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/statements.html#..._(rest)_parameter

package { import flash.display.MovieClip; public class RestParamExample extends MovieClip { public function RestParamExample() { traceParams(100, 130, "two"); // 100,130,two trace(average(4, 7, 13)); // 8 } } } function traceParams(... rest) { trace(rest); } function average(... args) : Number{ var sum:Number = 0; for (var i:uint = 0; i < args.length; i++) { sum += args[i]; } return (sum / args.length); } 

Answer 2

Try an ellipse (e.g. C) ...

 function trace_all (... args): void { for each (a in args) { trace (a); } } 

Answer 3

In addition to the rest parameter, arguments exist.

 function foo() { for (var i:Number = 0; i < arguments.length; i++) { trace(arguments[i]); } } 

Answer 4

If you want to pass an undefined number of ordered values, just pass an array

 function foobar(values:Array):void { ... } foobat([1.0, 3.4, 4.5]); foobat([34.6, 52.3, 434.5, 3344.5, 3562.435, 1, 1, 2, 5]); 

If you want to pass named parameters where only some of them are passed, use an object

  function woof(params:object):string { if (params.hasProperty('name')) { return name + "xxx"; } ... } woof({name:'Joe Blow', count: 123, title: 'Mr. Wonderful'});