read csv and write to file (append)

handleCSV.rb

IO.foreach("./test.csv") do |line|

    # Remove trailing whitespace.
    line.chomp!

    # Split on comma.
    values = line.split(",")

    # Write results.
    IO.write("/tmp/testfile", values.join("+") << "... " << String(values.length) << "\n", mode: 'a')
end