prototype + for..in demo

prototype demo.js

// modify Object.prototype
	Object.prototype.property = 'NEW PROPERTY';
	
// decalre datatypes
	var datatypes =
	[
		'hello',
		1,
		new Date(),
		{a:1, b:2, c:3},
		[1,2,3],
		true
	];
	
// loop
	for(var i = 0; i < datatypes.length; i++)
	{
		var obj = datatypes[i];
		fl.trace('\n' + obj + ' (' +typeof obj+ ')');
		for(var name in obj)
		{
			// should otherwise add in a check for obj.hasOwnProperty(name)
			// but the problem is that it will break any other scripts that
			// DON'T have this check, esp those that are using for..in where
			// they should be using for... the Flash IK tools are a case
 			// in point!

			fl.trace(' > ' + name + ':' + obj[name]);
		}
	}

// results
/*
	hello (string)
	 > 0:h
	 > 1:e
	 > 2:l
	 > 3:l
	 > 4:o
	 > property:NEW PROPERTY
	
	1 (number)
	 > property:NEW PROPERTY
	
	Thu Aug 18 2011 20:07:52 GMT+0100 (GMT Daylight Time) (object)
	 > property:NEW PROPERTY
	
	[object Object] (object)
	 > a:1
	 > b:2
	 > c:3
	 > property:NEW PROPERTY
	
	1,2,3 (object)
	 > 0:1
	 > 1:2
	 > 2:3
	 > property:NEW PROPERTY
	
	true (boolean)
	 > property:NEW PROPERTY
*/