looking forward to play with arduino

btw, I’ve met u on http://stackoverflow.com sometime ago .. :)

}
});
and declare object as follows:
var Object = new NewClass();

so you cant use NewClass or Object namespace in Classy.JS , if you use – and i did use in the past before i knew closures – that makes it impossible to declare more than one instance of same class in one document. :)

A very introduction to closures, it’s very easy to understand, even for beginners in AJAX.

JavaScript is a prototypal language in an of itself.

Many gurus (including Douglas Crockford himself) have admitted that it had been a philosophical mistake having been used JavaScript in an object oriented fashion.
– it’s against its nature.

Coming to your example. Each function in JavaScript is “by definition” a closure that closes over the global window object. Since you define a static global namespace “obj”; it is perfectly and utterly legitimate to refer to this namespace within your code base.

Optimization without measurement is not an optimization; and the depth of execution scope is hardly ever a problem in your example, but it’s worth to mention that defining a closure within another closure, or dynamically binding context using .bind, and using this within a loop increase the depth of execution scope. This may result in a slower running JavaScript code.

So instead of making things overly-convoluted, the below may saner a better approach — your mileage may vary of course.

var obj = {
counter:1,

set: function() {
var self = window.obj;

//besides using a good old for loop instead of $.each will be a lot faster.
$(‘li’).each(function(){
$(this).html(self.counter);
});
}
};

The above code is not against any object-oriented programming practices.

These three links may be some pointers to the right direction:

“Everything You Need To Know About JavaScript Functions (and more)”
http://o2js.com/2011/11/05/functional-programming-in-javascript/

“Functions and Closures in JavaScript”
http://o2js.com/2011/04/26/functions-and-closures-in-javascript/

“The JavaScript Module Pattern”
http://o2js.com/2011/04/24/the-module-pattern/

hope that helps,
Volkan

Saw your article on hack a day. You won’t believe it, but I’m in the process of building almost the same thing with almost the same parts list!

The main application I’m working on for mine is a feature that will cause the watch to notify me whenever it loses contact with my phone (Android). That way I will never leave my phone behind at a restaurant, when I leave for work, etc.

Keep up the good work!