smalljs

Smalltalk-like class semantics, collections and loops for JavaScript. Just for fun :).

Classes:

Define and instantiate a class:

Person = Object.subclass();
var somebody = Person.new();

Give it a constructor:

Person = Object.subclass({
    initialize: function() {
        console.log('A new person created!);
    }
});
var somebody = Person.new(); // prints 'A new person created!'

Pass some arguments to your constructor:

Person = Object.subclass({
	initialize: function() {
		console.log('Hello ' + this.firstName + ' ' + this.lastName);
	}
});
var person = Person.new({firstName: 'Keith', lastName: 'Fellows'}); // prints 'Hello Keith Fellows'

Loops:

Basic do loop:

from(3).to(6).do(function(n) {
    console.log(n);
});

prints:

3
4
5
6

Step by whatever number you like:

from(1).to(9).by(2).do(function(n) {
    console.log(n);
});

prints:

1
3
5
7
9

Count backwards:

from(3).to(0).do(function(n) {
    console.log(n);
    if (n == 0) {
        console.log('Lift Off!');
    }
});

prints:

3
2
1
0
Lift Off!

Collections:

Dictionaries:

var locations = Dictionary.new();

Adding stuff:

var locations = Dictionary.new();
locations.at('34 High Street').put('Bob');
locations.at('The Old Church').put('Theodore');

Iterating through the contents:

var locations = Dictionary.new();
locations.at('34 High Street').put('Bob');
locations.at('The Old Church').put('Theodore');
locations.do(function(key, value) {
    console.log(value + ' is at ' + key);
});

prints:

Bob is at 34 High Street
Theodore is at The Old Church

Other Dictionary methods:

myDictionary.size();
myDictionary.includesKey('blah'); // returns true or false
myDictionary.removeKey('blah');   

Set:

Coming soon...