Filter for excel csv file

excel_csv_filter.rb

# Excel cvs file filter
# usage :  ruby cvs_filter.rb input.csv column_no word
#

require "csv"

col_names = nil

CSV.open(ARGV[0], 'r') do |row|
  unless col_names
    STDOUT << CSV.generate_line(row) + "\n"
    col_names = row
  end

  STDOUT << CSV.generate_line(row) + "\n" if row[ARGV[1].to_i].data.include?(ARGV[2])
end