ActionScript 2.0 Language Reference - Adobe Help and Support

constructor (Object.constructor property)
public constructor : Object
Reference to the constructor function for a given object instance. The constructor property
is automatically assigned to all objects when they are created using the constructor for the
Object class.
Availability: ActionScript 1.0; Flash Player 5
Example
The following example is a reference to the constructor function for the myObject object.
var my_str:String = new String("sven");
trace(my_str.constructor == String); //output: true
If you use the instanceof operator, you can also determine if an object belongs to a specified
class:
var my_str:String = new String("sven");
trace(my_str instanceof String); //output: true
However, in the following example the Object.constructor property converts primitive
data types (such as the string literal seen here) into wrapper objects. The instanceof operator
does not perform any conversion, as seen in the following example:
var my_str:String = "sven";
trace(my_str.constructor == String); //output: true
trace(my_str instanceof String); //output: false
See also
instanceof operator
hasOwnProperty (Object.hasOwnProperty method)
public hasOwnProperty(name:String) : Boolean
Indicates whether an object has a specified property defined. This method returns true if the
target object has a property that matches the string specified by the name parameter, and
false otherwise. This method does not check the object's prototype chain and returns true
only if the property exists on the object itself.
Availability: ActionScript 1.0; Flash Player 6
Parameters
name:String -
Object 1009