Simple object declaration
myObjects = class {
// class attributes
aNumber = 4;
aString = "some text";
__new = function() {
// instance attributes
this.anotherNumber = 10;
};
addMax = function(p1, p2) {
if (p1 > p2)
return p1 + self.aNumber;
else
return p2 + this.anotherNumber;
};
};
o = myObject.new();
i = o.addMax(1, 2); // 12
j = o.addMax(7, 5); // 11
Inheritance
It is possible for a class to inherit from another class, to get all its characteristics (attributes and methods) with the possibility to override them.
Animal = class {
walk = function() { /* some code */ };
};
Dog = class extends Animal {
run = function() { /* ... */ };
};
Snoopy = class extends Dog {
walk = function() { /* ... */ };
};
snoop = new Snoopy();
snoop.run(); // from Dog
snoop.walk(); // from Snoopy, not from Animal
Avoiding inheritance
To prevent sub-classes of a given class, mark it as final.
Animal = final class { /* ... */ };
Doc = class extends Animal { /* ... */ }; // ERROR
Avoiding attributes overloading
To avoid the overloading of an attribute, mark it as final.
Animal = class {
final walk = function() { /* ... */ };
};
Dog = class extends Animal {
walk = function() { /* ... */ }; // ERROR
};