#!/usr/bin/env ruby

def generate( base, interval )
  lambda { base += interval }
end                                    # create incrementor generator

first_inc = generate( 5, 2 )           # generate first incrementor
puts first_inc.call                    # output: 7
puts first_inc.call                    # output: 9

second_inc = generate( 3, 1 )          # generate second incrementor
puts second_inc.call                   # output: 4
puts second_inc.call                   # output: 5

puts first_inc.call                    # output: 11
puts first_inc.call                    # output: 13

puts second_inc.call                   # output: 6
puts second_inc.call                   # output: 7

=begin

All Output:

7
9
4
5
11
13
6
7

=end