zips-to_text.rb

text = IO.read('zips.csv')
 
def add_leading(zip)
  if zip.size < 5
    t = 5 - zip.size
    t.times do
      zip = "0#{zip}"
    end
  end
  zip
end
 
zips = []
File.open('zipsout.txt', 'w+') do |f|
  text.split(/\n/).each do |line|
    line.split(/\,/).each do |zip|
      zip = zip.gsub(/\n|\t|\s/, '')
      unless zip.match(/[0-9]{1,5}/).nil?
        unless zips.include?(zip)
          f.write("#{add_leading(zip)}\n")
          zips << zip
        end
      end
    end
  end
end