how to place nested actionscript function in an actionsript project into separate actionscript file?

Question

I'm using Flash Builder 4.5. In an .mxml file, if you want to use an actionscript function residing in an external .as file, one simply adds to the .mxml file:

<fx:Script source="filename.as"/>

where filename.as contains the actionscript function(s).

Is there a way to do a similar thing from an .as project file? That is, I have an actionscript project created in Flash Builder 4.5 (e.g. no .mxml files anywhere), and I have a nested actionscript function. How can I place that nested actionscript function in an external file, then call it from the original file? My goal is to have that nested actionscript function be called from multiple other files, so I don't have to nest it multiple times.

Jonathan Rowny · Accepted Answer · 2011-11-11 19:03:41Z

2

The easiest way to do this is with a static function. Create an AS class file and remove the constructor. Now place your function in it and set the type to "public static", here is an example of a simple "stirng utility" class.

package some.place.inyourapp
{   
  public class StringUtils 
  {

    public static function contains( string:String, searchStr:String ):Boolean
    {
        var regExp:RegExp = new RegExp( searchStr, "i" );           
        return regExp.test( string );           
    }
  }
}

Now you can call that function without instantiating the class anywhere in your app by saying:

StringUtils.contains("this is cool","cool")

Of course, StringUtils must be imported

import some.place.inyourapp.StringUtils

answered Nov 11, 2011 at 19:03

Jonathan Rowny

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3 Comments

ggkmath Over a year ago

Thanks Jonathan, what's the purpose of "contains" above?

Jonathan Rowny Over a year ago

It's just an example function... yours can be anything. As long as you set the type to static, you can access it anywhere without instantiating an object.

ggkmath Over a year ago

Oh, I thought "contains" was an AS3 keyword, but now I realize it's the name you chose for the function. Silly me!

yms · Accepted Answer · 2011-11-13 15:59:13Z

0

Although it is not recommended, you could use the include operator.

...
include "myFile.as";
...

edited Nov 13, 2011 at 15:59

answered Nov 11, 2011 at 19:06

yms

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1 Comment

yms Over a year ago

@ggkmath It's an old fashioned/not object oriented approach. It will obscure your code and make it more diffucult to read and to maintain. I would recommend using Jonathan's solution if it is feasible for you.

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