Date range enumerator

date.rb

# usage:
# dr = DateRange.new(Date.today)
# dr.each{|d| puts d}
# enum = dr.lazy
# enum.next

# enum.find_all{|d| d.cwday < 5 } # returns all
# enum.detect{|d| d.cwday < 3 } # only returns the first instance 

require 'date'

class DateRange
  include Enumerable

  def initialize(from, step=7)
    end_date = from + step
    @range = (from...end_date)
  end

  # The class must provide a method each, which yields successive members of the collection
  def each
    @range.each{|e| yield(e)}
  end
end