Hi, Jeremy
Neko is prototype-based language. This means that objects are inherited from
other objects i.e. "prototypes" :-)
My way to implement classical OOP inheritance in Neko is following:
[code]
// class helper function
class = function (parent) {
var child = $new(null);
$objsetproto(child, parent);
return child;
}
// let's declare classes
// Document -- base class, has no parent class
Document = $new(null);
// Document's constructor
Document.init = function (title) {
this.title = title;
return this;
}
// let's create new class from Document
Article = class(Document);
// Article constructor
Article.init = function (title, author) {
this.author = author;
$call($objgetproto(this).init, this, $array(title));
return this;
}
Book = class(Article);
Book.init = function (title, author, pagesize) {
this.pagesize = pagesize;
$call($objgetproto(this).init, this, $array(title, author));
}
// $new() wrappers for better code readability
@Document = function (title) {
return $new(Document).init(title);
}
@Article = function (title, author) {
return $new(Article).init(title, author);
}
@Book = function (title, author, pagesize) {
return $new(Book).init(title, author, pagesize);
}
// getting real objects :-)
var a = @Article("Bizz @ speed of tought", "Bill Gates");
var a2 = @Book("My Book", "Me", "A4");
$print(a, "\n");
$print(a.title, "\n");
$print(a2, "\n");
$print(a2.title, "\n");
$print("a.pagesize = ", a.pagesize, "\n");
$print("a2.pagesize = ", a2.pagesize, "\n");
[end of code]
--
BR,
Vitali Falileev
http://blog.insideable.com
ICQ: 75008864
2007/6/14, Jeremy Smith <[EMAIL PROTECTED]>:
What is the proper way of creating ane inheritance structure in neko? Do
you clone the prototype of a type, add to it, and assign it to the
inherited type? Or is there some other language construct for achieving
this?
Neko looks awesome, easy to extend, and insanely fast. What a great
idea! Kudos to the developers.
Thanks,
Jeremy
--
Neko : One VM to run them all
(http://nekovm.org)
--
Neko : One VM to run them all
(http://nekovm.org)
