Adding additional methods in Ruby

Language: Ruby

Requirement: You want to write this:

2.weeks.ago

and have the date two weeks ago returned. With Ruby it’s easy. You can add any method you want to any object (including core objects like FixNum). Fun, huh?

require ‘date’

class Weeks

def initialize(number)

@number = number

end

def ago()

return Date.today – (@number * 7)

end

end

class Fixnum

def weeks

return Weeks.new(self)

end

end