ActionScript Cheat Sheet

package {
    import flash.display.Sprite;
    import flash.text.TextField;

    public class HelloWorld extends Sprite {
        public function HelloWorld() {
            var txt:TextField = new TextField();
            txt.text = "Hello, World!";
            addChild(txt);
        }
    }
}

trace("Hello, World!");
trace("Value:", 100);

// Single line comment

/* Multi-line
   comment */

trace("Code"); // Inline comment

var name:String = "John";
var age:int = 30;
var salary:Number = 75000.50;
var isActive:Boolean = true;

const TAX_RATE:Number = 0.0825;
const MAX_ITEMS:int = 100;
const COMPANY_NAME:String = "ACME Corp";

var colors:Array = ["Red", "Green", "Blue"];
var numbers:Array = [1, 2, 3, 4, 5];

// Typed array (Vector)
var names:Vector.<String> = new Vector.<String>();
names.push("John");
names.push("Jane");

var person:Object = {
    name: "John Doe",
    age: 30,
    email: "john@example.com"
};

trace(person.name);

if (age >= 18) {
    trace("Adult");
} else if (age >= 13) {
    trace("Teenager");
} else {
    trace("Child");
}

switch (grade) {
    case "A":
        trace("Excellent");
        break;
    case "B":
        trace("Good");
        break;
    case "C":
        trace("Average");
        break;
    default:
        trace("Failed");
        break;
}

for (var i:int = 0; i < 10; i++) {
    trace(i);
}

var colors:Array = ["Red", "Green", "Blue"];

for each (var color:String in colors) {
    trace(color);
}

function greet(name:String):void {
    trace("Hello, " + name);
}

greet("John");

function add(a:Number, b:Number):Number {
    return a + b;
}

var result:Number = add(10, 20);
trace(result); // 30

function greet(name:String, greeting:String = "Hello"):void {
    trace(greeting + ", " + name);
}

greet("John");           // Hello, John
greet("Jane", "Hi");     // Hi, Jane

function sum(...numbers):Number {
    var total:Number = 0;
    for each (var num:Number in numbers) {
        total += num;
    }
    return total;
}

trace(sum(1, 2, 3, 4, 5)); // 15

package {
    public class Person {
        private var _name:String;
        private var _age:int;

        public function Person(name:String, age:int) {
            _name = name;
            _age = age;
        }

        public function get name():String {
            return _name;
        }

        public function set name(value:String):void {
            _name = value;
        }
    }
}

package {
    public class Employee extends Person {
        private var _salary:Number;

        public function Employee(name:String, age:int, salary:Number) {
            super(name, age);
            _salary = salary;
        }

        public function get salary():Number {
            return _salary;
        }
    }
}

package {
    public class MathUtil {
        public static function add(a:Number, b:Number):Number {
            return a + b;
        }
    }
}

// Usage
var result:Number = MathUtil.add(10, 20);

import flash.events.MouseEvent;

var button:Sprite = new Sprite();
button.addEventListener(MouseEvent.CLICK, onClick);

function onClick(event:MouseEvent):void {
    trace("Button clicked!");
}

button.removeEventListener(MouseEvent.CLICK, onClick);

import flash.events.Event;

public class CustomEvent extends Event {
    public static const CUSTOM_EVENT:String = "customEvent";
    public var data:Object;

    public function CustomEvent(type:String, data:Object = null) {
        super(type);
        this.data = data;
    }
}

import flash.display.Sprite;

var box:Sprite = new Sprite();
box.graphics.beginFill(0xFF0000);
box.graphics.drawRect(0, 0, 100, 100);
box.graphics.endFill();
addChild(box);

box.x = 100;
box.y = 50;
box.scaleX = 2;
box.scaleY = 2;
box.rotation = 45;
box.alpha = 0.5;

removeChild(box);

// Or from parent
if (box.parent) {
    box.parent.removeChild(box);
}

var text:String = "Hello World";

var upper:String = text.toUpperCase();
var lower:String = text.toLowerCase();
var length:int = text.length;
var sub:String = text.substring(0, 5); // "Hello"
var index:int = text.indexOf("World"); // 6

var firstName:String = "John";
var lastName:String = "Doe";
var fullName:String = firstName + " " + lastName;

// Or using concat
fullName = firstName.concat(" ", lastName);

var csv:String = "Red,Green,Blue";
var colors:Array = csv.split(",");

var joined:String = colors.join(", "); // "Red, Green, Blue"