[Flashcoders] AS2 vs. AS3: instantiate library symbols with a loop string concatenation

[jonathan howe]

Imagine I have in my library a series of MovieClips with linkage identifiers
like so:

sym0
sym1
sym2
...
sym29

In AS2, if I wanted to create instances of each one (or perhaps decide which
symbol to use based on XML data, for example), I could use a for loop:

for (var i:Number = 0; i  30; i ++) {
var new_mc:MovieClip = parent_mc.attachMovie(sym + i, sym + i, i);
// do stuff with clip
}

and create each symbol via passing a concatenated string as symbolName.

Now, in AS3, I can't think of a way to do this efficiently. In our simple
example, I can only think of the following:

for (var i:int = 0; i  30; i ++) {
var sym:MovieClip;
 switch (i) {
 case 0: sym = new sym0();
 case 1: new sym1();
 case 2: new sym2();
...
 }
// do stuff with clip
}


Is there a more efficient way to do this in AS3? You can't really
instantiate a class based on a stringname, can you?


-- 
-jonathan howe :: 404.434.2321 :: 180 High St Apt 26 Portland, ME 04101
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Re: [Flashcoders] AS2 vs. AS3: instantiate library symbols with a loop string concatenation

[eric e. dolecki]

for( var i:uint = 0; i30; i++ )
{
var sym:MovieClip = new Item();
sym.name = sym+i;
someContainer.addChild( sym );
}
...
someContainer.getChildAt( nIndex );
etc.



On Tue, Mar 4, 2008 at 3:25 PM, jonathan howe [EMAIL PROTECTED]
wrote:

 Imagine I have in my library a series of MovieClips with linkage
 identifiers
 like so:

 sym0
 sym1
 sym2
 ...
 sym29

 In AS2, if I wanted to create instances of each one (or perhaps decide
 which
 symbol to use based on XML data, for example), I could use a for loop:

 for (var i:Number = 0; i  30; i ++) {
var new_mc:MovieClip = parent_mc.attachMovie(sym + i, sym + i, i);
// do stuff with clip
 }

 and create each symbol via passing a concatenated string as symbolName.

 Now, in AS3, I can't think of a way to do this efficiently. In our simple
 example, I can only think of the following:

 for (var i:int = 0; i  30; i ++) {
 var sym:MovieClip;
 switch (i) {
 case 0: sym = new sym0();
 case 1: new sym1();
 case 2: new sym2();
 ...
 }
// do stuff with clip
 }


 Is there a more efficient way to do this in AS3? You can't really
 instantiate a class based on a stringname, can you?


 --
 -jonathan howe :: 404.434.2321 :: 180 High St Apt 26 Portland, ME 04101
 ___
 Flashcoders mailing list
 Flashcoders@chattyfig.figleaf.com
 http://chattyfig.figleaf.com/mailman/listinfo/flashcoders

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Re: [Flashcoders] AS2 vs. AS3: instantiate library symbols with a loop string concatenation

[Kenneth Kawamoto]

for(var i:uint = 0; i30; i++){
   var sym:MovieClip = new (getDefinitionByName(Sym + i) as Class)();
   parent_mc.addChild(sym);
}

Kenneth Kawamoto
http://www.materiaprima.co.uk/

jonathan howe wrote:

Imagine I have in my library a series of MovieClips with linkage identifiers
like so:

sym0
sym1
sym2
...
sym29

In AS2, if I wanted to create instances of each one (or perhaps decide which
symbol to use based on XML data, for example), I could use a for loop:

for (var i:Number = 0; i  30; i ++) {
var new_mc:MovieClip = parent_mc.attachMovie(sym + i, sym + i, i);
// do stuff with clip
}

and create each symbol via passing a concatenated string as symbolName.

Now, in AS3, I can't think of a way to do this efficiently. In our simple
example, I can only think of the following:

for (var i:int = 0; i  30; i ++) {
var sym:MovieClip;
 switch (i) {
 case 0: sym = new sym0();
 case 1: new sym1();
 case 2: new sym2();
...
 }
// do stuff with clip
}


Is there a more efficient way to do this in AS3? You can't really
instantiate a class based on a stringname, can you?



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