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ActionScript 2.0 Best Practices

Ashley Peach
Expert Author
Published: 2006-06-23

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Actionscript is a very powerful language made by macromedia. Learning actionscript can be tricky until you get your mind thinking the same way actionscript does.

Actionscript is evolving at a very fast rate into a top programming language. With the release of ActionScript 3.0 expected in the next few months it's important to get use to good 2.0 practices.

So what are correct 2.0 practices?

Correct 2.0 practices would include strict data typing all variables, function return values and values excepted. Strict data typing can also be used in classes which is another great 2.0 practice.

OOP is Object Orientated Programming; OOP is like an advanced external function. Languages such as Java are purely OOP all programming done is Java uses classes.

The advantages to classes are they can be re-used time and time again. They can be extended with additional classes, They can be shared and they're great for organization.

Once you start programming things over 1000 lines of code, things can get very complicated and sometimes impossible because you simply don't know what goes next. This is where classes come in. Classes will organize your entire site into manageable sections.

An example of using classes would be a members system. You could create a members class, and that class could contain a signup function that registers the users checked for blank values and further validation.

You could then have a login function which checked the user's name and password against the database and returned a value of true if the username and password supplied match that of the database.

OOP really is the future of programming without OOP you will struggle with medium to large sized projects. Another huge advantage to OOP is when working in a team you can simply work on a class each and modify or extend another persons class. Where as without OOP you would have to look through maybe 10,000 lines of code to find 5 lines of code that needed modifying.

Good 2.0 practices would also be using movieclips instead of buttons. Movieclips have far more functionality than buttons ever could. Actionscript 2.0 can do just about anything to movieclips: change the coulor, size, shape, movement, and the list goes on and on. Buttons really are the past. The future is movieclips.

How to define strict datatypeing

For example to define a variable as a number we would use

var - to signal what we are defining is a variable.

thename - anything you like to identify the specific variable.

:number - the datatype this could be a number, boolean or string.

= - to define what will be inside the variable.

4 - the value that sits inside the variable.

; - just to end the line of code

So in full

var thename:Number = 4;

String and boolean would look as follows:

var thestring:String = hello;

var theboolean:Boolean = true;

If you wanted to make something happen when a user clicked a movie clip, the correct 2.0 code to use would be:

nameofthemovieclip.onPress = function ():Void {

//what you would like to happen in here.


We define the function as void so that actionscript does not except a retuned value. If we were to put expected values inside the function we would use:

myfunc = function (mynumber:Number):Void{

//code goes here


So remember to always use correct 2.0 practices and your code will shine.


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About the Author:
Ashley Peach - Owns Dog toys, Dog books and Dog coats.

View their website at: http://www.dog-toy.co.uk/

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