for in和for each遍历的区别

			var dataSource:Object = {};
			dataSource[1] = 1000;
			dataSource[2] = 2000;
			dataSource[3] = 3000;
			dataSource[4] = 4000;
			console.log("for each遍历");
			for each(var value:int in dataSource){
				console.log("for each"+"-"+value);
			}
			console.log("for in遍历");
			for (var key:int in dataSource){
				console.log("for in"+"-"+key);
			}

根据代跑跑出来的结果可以发现，for each遍历的是dataSource中的每一项value

for in 遍历的是dataSource中每一项的key值