How can I call function or object name in string variable? actionscript3

Question

I need to call an object or function name with string variable.

For example;

var item_1:Object;
var str:String = "item_1";
TweenLite.to(item_1, 2, {alpha:0});

it's working but,
if I do something like below its not working

var item_1:Object;
var str:String = "item_1";
TweenLite.to(str, 2, {alpha:0});

how can do that? thanks from now..

pho · Accepted Answer · 2012-03-15 17:36:39Z

3

Try something like

this[str];
//or
root[str]

All objects in AS3 can be accessed as object[key]=value

So, if you know where item_1 is declared, you can call it as itemParent["item_1"] or in your example, itemParent[str]

answered Mar 15, 2012 at 17:36

pho

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Comments

Sam DeHaan · Accepted Answer · 2012-03-15 17:34:25Z

2

I'm having some trouble reading your question, but it seems like you're looking for the following:

var item_1:Object
var str:String = "item_1"
TweenLite.to(this[str], 2, {alpha:0});

To dynamically access objects by their id from a string, you need to use the this["itemid"] notation.

answered Mar 15, 2012 at 17:34

Sam DeHaan

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3 Comments

Sam DeHaan Over a year ago

@sch Ah. I've never encountered the need to use this notation, so I'm not familiar with its limitations. Thanks.

pho Over a year ago

ah dammit! undone by a slow internet connection!! :P @sch you're right, but I guess we should get the benefit of the doubt, no?

user562566 Over a year ago

Yeah I believe that the "dynamic" keyword in flash should be completely removed. Dynamic resolution can ONLY promote poor coding practice and as such will always lead to slower performance. That's why you never see any of the mature languages employ such an atrocious feature.

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