package { import com.actionscriptbible.Example; import flash.display.Sprite; public class ch10ex3 extends Example { public function ch10ex3() { var sprite:Sprite = new Sprite(); sprite.alpha = 1; trace("alpha" in sprite); //true, that's a property sprite.getChildByName("subclip"); trace("getChildByName" in sprite); //true, that's a method var person:Person = new Person("Ben"); trace("name" in person); //true, Person has a name trace("SSN" in person); //false, because it's private! trace("unicorn" in person); //false, that's just silly } } } class Person { public var name:String; private var SSN:Number; public function Person(name:String) { this.name = name; } }