Project Euler 2

/**
 * Copyright potix2 ( http://wonderfl.net/user/potix2 )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/yFRo
 */

// forked from potix2's PE001
//@see http://projecteuler.net/index.php?section=problems&id=2
package {
    import flash.display.Sprite;
    import flash.text.TextField;
    import flash.text.TextFieldAutoSize;
    import flash.events.Event;
    
    public class PE002 extends Sprite {
        private function main():void {
        		setToTable(1, 0);
        		setToTable(2, 1);
        		
        		var sum:Number = 0;
        		var i:int = 1;
        		var f:int = fib(1);
        		while(f < 4000000) {
        		 	i++;
        			f = fib(i);
        			if ( f % 2 == 0 ) {
        				log('*' + f);
        				sum += f;
        			}
        			else {
        				log(' ' + f);
        			}
        		}
        		log('sum=' + sum);
        }
        
        private function fib(n:int):int {
        		if ( existsToTable(n) ) {
        			return getFromTable(n);
        		}
        		else {
        			var ret:int = fib(n - 1) + fib(n - 2);
        			setToTable(n, ret);
        			return ret;
        		}
        }
        
        // setup
    		private var _console:TextField;
    		private var _table:Object;
        public function PE002() {
        		addEventListener(Event.ADDED_TO_STAGE, init);
        		initTable();
        }
        
        private function initTable():void {
        		_table = new Object();
        }
        
        private function existsToTable(key:int):Boolean {
        		return _table.hasOwnProperty(key);
        }
        
        private function getFromTable(key:int):int {
        		if ( existsToTable(key) ){
        			return _table[key] as int;
        		}
        		else {
        			return undefined;
        		}
        }
        
        private function setToTable(key:int, val:int):void {
        		_table[key] = val;
        }
        
        private function init(event:Event):void {
        	    	_console = new TextField();
        	    	_console.multiline = true;
        	    	_console.selectable = true;
        	    	_console.autoSize = TextFieldAutoSize.LEFT;
        		addChild(_console);
        		main();
        }
         
        private function log(msg:String):void {
        		_console.appendText("\n" + msg);
        }
        
        private function dumpVector(v:Vector.<int>):void {
        		v.forEach(function (item:int, index:uint, vect:Vector.<int>):void {
        			this.log(item);
        		}, this);       	
        }
        
    }
}
class VectorUtil {
	public static function range(min:int, max:int):Vector.<int> {
		var ret:Vector.<int> = new Vector.<int>(max - min + 1);
		var i:int = 0;
		while(i + min <= max ) {
			ret[i] = min + i;
			i++;
		}
		return ret;
	}
}