RE: [Flashcoders] recursive question?

2009-01-14 Thread Merrill, Jason 
Real quick idea,not tested (the code below could probably be made better with a 
rest statement - see link below), how about not doing it recursively (because 
that's why it's calling remove more than once), but doing something like this:

import flash.display.Sprite;

private function removePrevious():void {
if (xAxis!=null) {
removeChild(xAxis);
xAxis = null;
}
if (yAxis!=null) {
removeChild(yAxis);
yAxis = null;
}
}

private function renderAxis(which:String):void 
removePrevious();
switch (which) 
{
case (X) :
xAxis = new Sprite();
draw([xAxis]);
break;
case (Y) :
var yAxis:Sprite = new Sprite();
draw([yAxis]);
break;
case (both) :
var xAxis:Sprite = new Sprite();
var yAxis:Sprite = new Sprite();
draw([xAxis, yAxis]);
break;
}
}

private function draw(axes:Array):void
{
for (var i:int = 0; i  numAxes; i++)
{
addChild(axes[i]);
}
}

Or for the draw method, use a rest parameter instead of an array:

http://help.adobe.com/en_US/ActionScript/3.0_ProgrammingAS3/WS5b3ccc516d4fbf351e63e3d118a9b90204-7f56.html



Jason Merrill
Bank of America Instructional Technology  Media   ·   GCIB  Staff Support 
LLD

Interested in Flash Platform technologies?  Join the Bank of America Flash 
Platform Developer Community 
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Blog and subscribe.





-Original Message-
From: flashcoders-boun...@chattyfig.figleaf.com 
[mailto:flashcoders-boun...@chattyfig.figleaf.com] On Behalf Of Mendelsohn, 
Michael
Sent: Wednesday, January 14, 2009 2:28 PM
To: Flash Coders List
Subject: [Flashcoders] recursive question?

Hi list...

I have two functions, where either an X is rendered, a Y is rendered, or
both an X and a Y.  removePrevious() is called before anything gets
rendered, so as to clear the stage.  The problem is when both are
rendered, removePrevious() is called twice. It first clears the stage,
renders a new x, then renders a new y -- but not before removing that
newly just created X.  How can I avoid this?

Thanks,
- Michael M.

private function removePrevious():void {
if (xAxis!=null) {
removeChild(xAxis);
xAxis = null;
}
if (yAxis!=null) {
removeChild(yAxis);
yAxis = null;
}
}
private function renderAxis(which:String):void 
removePrevious();
switch (which) {
case (X) :
xAxis = new Sprite();
addChild(xAxis);
break;
case (Y) :
yAxis = new Sprite();
addChild(yAxis);
break;
case (both) :
renderAxis(X);
renderAxis(Y);
break;
}
}

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Re: [Flashcoders] recursive question?

2009-01-14 Thread Taka Kojima 
I would probably just do something like...

private function renderAxis(which:String, doRemove:Boolean = true):void

  if(doRemove){removePrevious();}
   switch (which) {
   case (X) :
   xAxis = new Sprite();
   addChild(xAxis);
   break;
   case (Y) :
   yAxis = new Sprite();
   addChild(yAxis);
   break;
   case (both) :
   renderAxis(X,false);
   renderAxis(Y,false);
   break;
   }
}


On Wed, Jan 14, 2009 at 11:27 AM, Mendelsohn, Michael 
michael.mendels...@fmglobal.com wrote:

 Hi list...

 I have two functions, where either an X is rendered, a Y is rendered, or
 both an X and a Y.  removePrevious() is called before anything gets
 rendered, so as to clear the stage.  The problem is when both are
 rendered, removePrevious() is called twice. It first clears the stage,
 renders a new x, then renders a new y -- but not before removing that
 newly just created X.  How can I avoid this?

 Thanks,
 - Michael M.

 private function removePrevious():void {
if (xAxis!=null) {
removeChild(xAxis);
xAxis = null;
}
if (yAxis!=null) {
removeChild(yAxis);
yAxis = null;
}
 }
 private function renderAxis(which:String):void
removePrevious();
switch (which) {
case (X) :
xAxis = new Sprite();
addChild(xAxis);
break;
case (Y) :
yAxis = new Sprite();
addChild(yAxis);
break;
case (both) :
renderAxis(X);
renderAxis(Y);
break;
}
 }

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RE: [Flashcoders] recursive question?

2009-01-14 Thread Merrill, Jason 
Right Taka, thinking the same thing, and I was just assuming he was doing 
something more (not shown) in the draw function other than just adding the 
child - otherwise, you're just adding blank things to the screen. 


Jason Merrill
Bank of America Instructional Technology  Media   ·   GCIB  Staff Support 
LLD

Interested in Flash Platform technologies?  Join the Bank of America Flash 
Platform Developer Community 
Interested in innovative ideas in Learning?  Check out the Innovative Learning 
Blog and subscribe.






-Original Message-
From: flashcoders-boun...@chattyfig.figleaf.com 
[mailto:flashcoders-boun...@chattyfig.figleaf.com] On Behalf Of Taka Kojima
Sent: Wednesday, January 14, 2009 3:09 PM
To: Flash Coders List
Subject: Re: [Flashcoders] recursive question?

I would probably just do something like...

private function renderAxis(which:String, doRemove:Boolean = true):void

  if(doRemove){removePrevious();}
   switch (which) {
   case (X) :
   xAxis = new Sprite();
   addChild(xAxis);
   break;
   case (Y) :
   yAxis = new Sprite();
   addChild(yAxis);
   break;
   case (both) :
   renderAxis(X,false);
   renderAxis(Y,false);
   break;
   }
}


On Wed, Jan 14, 2009 at 11:27 AM, Mendelsohn, Michael 
michael.mendels...@fmglobal.com wrote:

 Hi list...

 I have two functions, where either an X is rendered, a Y is rendered, or
 both an X and a Y.  removePrevious() is called before anything gets
 rendered, so as to clear the stage.  The problem is when both are
 rendered, removePrevious() is called twice. It first clears the stage,
 renders a new x, then renders a new y -- but not before removing that
 newly just created X.  How can I avoid this?

 Thanks,
 - Michael M.

 private function removePrevious():void {
if (xAxis!=null) {
removeChild(xAxis);
xAxis = null;
}
if (yAxis!=null) {
removeChild(yAxis);
yAxis = null;
}
 }
 private function renderAxis(which:String):void
removePrevious();
switch (which) {
case (X) :
xAxis = new Sprite();
addChild(xAxis);
break;
case (Y) :
yAxis = new Sprite();
addChild(yAxis);
break;
case (both) :
renderAxis(X);
renderAxis(Y);
break;
}
 }

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RE: [Flashcoders] recursive question?

2009-01-14 Thread Mendelsohn, Michael 
Interesting answers, Jason and Taka.  Thanks very much!

In migrating to AS3, I guess I have to be reminded about simply removing
the child.

- MM


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RE: [Flashcoders] recursive question?

2009-01-14 Thread Mendelsohn, Michael 
Oh trust me Jason, there's *plenty* more going on besides blank things.
:-D

- MM


Right Taka, thinking the same thing, and I was just assuming he was
doing something more (not shown) in the draw function other than just
adding the child - otherwise, you're just adding blank things to the
screen. 


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Re: [Flashcoders] recursive question?

2009-01-14 Thread Taka Kojima 
Well, I generally ask myself two questions when I find myself writing a
recursive functioin: does using a recursive function actually simplify
things here? Do I actually need to use it?

I.e. don't use recursive functions for the sake of having a recursive
function -- you will find that you actually don't have to use them very
often, and if you find yourself using one you should question whether or not
it is really needed... a lot of times (as in this case) the answer will be
no.

But then again, you may have simplified your app for the sake of an example
and you might be doing more things where it would make sense for a recursive
function

- Taka

On Wed, Jan 14, 2009 at 12:29 PM, Merrill, Jason 
jason.merr...@bankofamerica.com wrote:

 Right Taka, thinking the same thing, and I was just assuming he was doing
 something more (not shown) in the draw function other than just adding the
 child - otherwise, you're just adding blank things to the screen.


 Jason Merrill
 Bank of America Instructional Technology  Media   ·   GCIB  Staff
 Support LLD

 Interested in Flash Platform technologies?  Join the Bank of America Flash
 Platform Developer Community
 Interested in innovative ideas in Learning?  Check out the Innovative
 Learning Blog and subscribe.






 -Original Message-
 From: flashcoders-boun...@chattyfig.figleaf.com [mailto:
 flashcoders-boun...@chattyfig.figleaf.com] On Behalf Of Taka Kojima
 Sent: Wednesday, January 14, 2009 3:09 PM
 To: Flash Coders List
 Subject: Re: [Flashcoders] recursive question?

 I would probably just do something like...

 private function renderAxis(which:String, doRemove:Boolean = true):void

  if(doRemove){removePrevious();}
   switch (which) {
   case (X) :
   xAxis = new Sprite();
   addChild(xAxis);
   break;
   case (Y) :
   yAxis = new Sprite();
   addChild(yAxis);
   break;
   case (both) :
   renderAxis(X,false);
   renderAxis(Y,false);
   break;
   }
 }


 On Wed, Jan 14, 2009 at 11:27 AM, Mendelsohn, Michael 
 michael.mendels...@fmglobal.com wrote:

  Hi list...
 
  I have two functions, where either an X is rendered, a Y is rendered, or
  both an X and a Y.  removePrevious() is called before anything gets
  rendered, so as to clear the stage.  The problem is when both are
  rendered, removePrevious() is called twice. It first clears the stage,
  renders a new x, then renders a new y -- but not before removing that
  newly just created X.  How can I avoid this?
 
  Thanks,
  - Michael M.
 
  private function removePrevious():void {
 if (xAxis!=null) {
 removeChild(xAxis);
 xAxis = null;
 }
 if (yAxis!=null) {
 removeChild(yAxis);
 yAxis = null;
 }
  }
  private function renderAxis(which:String):void
 removePrevious();
 switch (which) {
 case (X) :
 xAxis = new Sprite();
 addChild(xAxis);
 break;
 case (Y) :
 yAxis = new Sprite();
 addChild(yAxis);
 break;
 case (both) :
 renderAxis(X);
 renderAxis(Y);
 break;
 }
  }
 
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