gistfile1.rb

# With rQRcode
require "rubygems"
require "rqrcode"

# With rQRcode
100.times do |i|
  RQRCode::QRCode.new("iteration number #{i}", :size => 4, :level => :h)
end

# With libqrencode
100.times do |i|
  system("/usr/local/bin/qrencode 'iteration number #{i}' -o /Users/chris/qr/iteration-#{i}.png")
end