flash - 检查值是否为数字

Question

我怎样才能简单地检查是否返回了 int 类型的值？或 uint是一个数字吗？

Answer 1

简单的:

if(_myValue is Number)
{
    fire();

}// end if

[更新]

请记住，如果 _myValue类型为 int或 uint ，然后 (_myValue is Number)也将等于 true .如果您想知道是否_myValue是一个不是整数(int)或无符号整数(uint)的数字，换句话说，一个浮点数，那么你可以简单地修改条件如下:

(_myValue is Number && !(_myValue is int) && !(_myValue is uint))

让我们看一个例子:

package 
{
    import flash.display.Sprite;
    import flash.events.Event;

    public class Main extends Sprite 
    {

        public function Main():void 
        {
            if (stage) init();
            else addEventListener(Event.ADDED_TO_STAGE, init);
        }

        private function init(e:Event = null):void 
        {
            removeEventListener(Event.ADDED_TO_STAGE, init);

            var number1:Object = 1; // int
            var number2:Object = 1.1; // float
            var number3:Object = 0x000000; // uint

            trace(number1 is Number); // true
            trace(number2 is Number); // true
            trace(number3 is Number); // true

            trace(number1 is Number && !(number1 is int) && !(number1 is uint)); // false
            trace(number2 is Number && !(number2 is int) && !(number2 is uint)); // true
            trace(number3 is Number && !(number3 is int) && !(number3 is uint)); // false

        }

    }

}