Created
October 13, 2011 05:05
-
-
Save hyoshiok/1283436 to your computer and use it in GitHub Desktop.
cut a field of csv file.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# encodings: utf-8 | |
=begin :rdoc | |
= cut_f.rb | |
This script prints a field of CSV file. | |
The format of the csv file is the following | |
id, replied_to_id, thread_id, timestamp, group, recipients, private, user_id, user, email_address, body, url, attachment_ids | |
= usage | |
ruby cut_f.rb field-number <csv-file> | |
= output | |
print n-th field | |
Author :: hirotaka.yoshioka@mail.rakuten.com | |
Date :: 6/2/2011 created | |
= history | |
06/02/2011 initial | |
=end | |
require 'csv' | |
field_num = ARGV[0].to_i | |
if ARGV[1] == "-" or ARGV[1] == nil | |
io = $stdin | |
else | |
io = File.open(ARGV[1], "r") | |
end | |
CSV::Reader.create(io.read).each do |row| | |
print row[field_num], "\n" | |
end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment