find replace strings in a text file given a CSV of: target,replacement

findreplace.rb

#!/usr/bin/env ruby

require 'csv'

translation = CSV.read(ARGV[0])

translation.map! { |x| [/#{x[0]}/, x[1]] }

d = File.read('/dev/stdin')

translation.each do |target, replacement|
  d.gsub! target, replacement
end

print d