Learning ActionScript 2.0 in Adobe Flash
Best Practices and Coding Conventions for ActionScript 2.0 > ActionScript coding conventions > Handling scope > Using the this keyword

Using the this keyword

Whenever possible, use the this keyword as a prefix instead of omitting the keyword, even if your code works without it. Use the this keyword to learn when a method or property belongs to a particular class. For example, for a function on a timeline, you write ActionScript 2.0 code by using the following format:

circleClip.onPress = function() {
    this.startDrag();
};
circleClip.onRelease = function() {
    this.stopDrag();
};

For a class, use the following format to write code:

class User {
    private var username:String;
    private var password:String;
    function User(username:String, password:String) {
        this.username = username;
        this.password = password;
    }
    public function get username():String {
        return this.username;
    }
    public function set username(username:String):Void {
        this.username = username;
    }
}

If you consistently add the this keyword in these situations, your ActionScript 2.0 code will be much easier to read and understand.

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