get unicode range

UnicodeRange.as

/*
 * @mxmlc -debug -o=UnicodeRange.swf
 */
package
{
	import flash.display.Sprite;
	
	/**
	 * description：get unicode range
	 * use charCodeAt to get numeric Unicode character code
	 * and covert it to 16 hex
	 */
	public class UnicodeRange extends Sprite
	{
		public function UnicodeRange()
		{
			getUnicodeRange('123abc我是測試許功蓋怪字');
		}
		
		private function getUnicodeRange(__input:String):void
		{
			var str:String = __input;
			var i:uint, n:uint = str.length;
			var arr:Array = [];
			for (i = 0; i < n; i++)
			{
				var r:Number = str.charCodeAt(i);
				arr[i] = "U+" + convert2Hex(r);
			}
			arr.sort();
			//output: unicodeRange = 'U+0031, U+0032, U+0033, U+0061, U+0062, U+0063, U+529f, U+5b57, U+602a, U+6211, U+662f, U+6e2c, U+84cb, U+8a31, U+8a66'
			trace("unicodeRange = '" + arr.join(", ") + "'");
		}
		
		private function convert2Hex(__r:Number):String 
		{
			var t:String = __r.toString(16);
			var j:uint = t.length;
			if (j < 4) {
				t = ("0000" + t).substr(-4,4);
			}
			return t;
		}
	}

}