First of all, since I made the front page of Ajaxian, a lot of new readers joined in. Welcome to all of you. I would also take a moment to explain that Javascript Kata is a technical blog about javascript and though I will talk here and there about ajax, it is not focused on […]

[I’ve also written the short answer (for advanced javascripters)]
Javascript is using prototypes and is the only language I know that is doing it. What is the idea behind it? Simple. With prototypes, you can extend (add methods/properties) any class you want anywhere you want anytime you want even if you are not the […]

Javascript is a functional programming language thus having no “real” objects. You can write it the way you want : procedural spag, functional, object or whatever word you know. Why should I write it object-oriented? Because, OO has proven many times its ease of use and great encapsulation. In this paper, I won’t talk about […]

The intrinsec objects of javascript (String, Number, Date, etc) are missing a lot of handy methods. God knows why. Example, you don’t have a trim() function on a String object. Maybe the developers thought that it was easy enough to write theString.replace(/^\s*|\s*$/g, “”) to trim a string but that’s not the kind of ugly code […]

[I’ve also written a longer answer for beginners] 
Prototypes can extend any class you want by adding a property or a method. By calling,
[source:javascript]
String.prototype.alertMe = function() {
alert(this);
}
[/source]
you are adding the method alertMe() to every String object of your application.
It uses less memory because javascript creates only one instance of the function and uses references to it.
Short […]