Object Hierarchy and Inheritance in JavaScript 2

I stumbled across this link and thought some of you might find it interesting. It talks about how to make an object inherit from another object. For example, I can make a "Developer" object inherit all the properties and methods of the more generic "Person" object.

<script>
Person = function(name){
  this.name = name || "";
  this.birthDate = "unknown";
}

Developer = function(name, skills){
  this.base = Person;
  this.base(name);
  this.skills = skills || [];

}
Developer.prototype = new Person;

var newGuy = new Developer("Bob", ["JavaScript","ASP"]);
alert(newGuy.name)
alert(newGuy.birthDate)
alert(newGuy.skills)

</script>

So if I went and added a property to the "Person" object (at either design-time or run-time), any objects inheriting from that object would also get it. This may cut down on the amount of code and maintenance time for your project if your project is complex enough to warrant using such a technique.

Adam

There are only 10 types of people in the world: Those who understand binary, and those who don't

 

[tsdragon]

My projects are frequently complex enough to warrant that kind of thing. Thanks for the tip.


Tracy Dryden

Meddle not in the affairs of dragons,
For you are crunchy, and good with mustard.

 

[BillyRayPreachersSon]

Thanks Adam...

I'd read that entire document before, but had forgotten one of the crucial bits of information it mentioned - which I just found myself needing. Handy, eh?!

Dan


[tt]D'ya think I got where I am today because I dress like Peter Pan here?[/tt]

 

[tsdragon]

Here's another page that describes inheritance in JavaScript. It evens describes how to do multiple inheritance.

http://www.crockford.com/javascript/inheritance.html

Tracy Dryden

Meddle not in the affairs of dragons,
For you are crunchy, and good with mustard.