ActionScript - Using "is" comparative in switch statement?

Question

i have many objects of the same custom class, and another many objects of another custom class. i would like to create a switch statement to determine from which of the classes the object belongs. the following code doesn't compile, so i'm not sure if this is possible. is the only alternative to use if statements?

function mouseClickEventHandler(evt:MouseEvent):void
     {
     switch (evt.currentTarget)
            {
            case (is customClassA):  trace("is instance of customClassA");  break
            case (is customClassB):  trace("is instance of customClassB");
            }
     }

poke · Accepted Answer · 2010-09-24 16:23:11Z

12

This should work:

function mouseClickEventHandler ( evt:MouseEvent ):void
{
    switch ( evt.currentTarget.constructor )
    {
        case CustomClassA:
            trace("is instance of customClassA");
            break;

        case CustomClassB:
            trace("is instance of customClassB");
            break;
    }
}

See Object.constructor.

answered Sep 24, 2010 at 16:23

poke

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Comments

average dev · Accepted Answer · 2010-09-27 12:44:00Z

3

function clickHandler (event:MouseEvent):void
{
    var target:Object = event.currentTarget;
    switch (true)
    {
        case (target is CustomClassA):
            trace("is instance of customClassA");
            break;

        case (target is CustomClassB):
            trace("is instance of customClassB");
            break;
    }
}

Not sure if braces are needed

answered Sep 27, 2010 at 12:44

average dev

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