Add to Fixnum a method to compute business days from today

business_days.rb

#!/usr/bin/env ruby

class Fixnum < Integer
  
  # Counts a given number of business days from today
  def business_days_from_today
    d = Date.today
    day_count = 0

    while(day_count <= self)
      if(d.wday != 6) && (d.wday != 0) #=> Only add to our count if we're not on a weekend
        day_count+=1
      end
      d = d.next #=> Always move to the next day
    end
    d-1 #=> Subtract 1 to get the final date since we always jump one ahead at the end.
  end
end