CompactCSV is memory efficient csv module for ruby. Reading operations are compatible with default CSV module.

However, operations which change fields/values structure of row are not available in CompactCSV. If you want to do this, please use default CSV module.

Add this line to your application's Gemfile:

gem 'compact_csv'

And then execute:

$ bundle

Or install it yourself as:

$ gem install compact_csv

csv = CompactCSV.read('sample.csv', headers: true)
csv.each do |row|
  p row # => #<CompactCSV::Row "ID":"1" "VALUE":"A">
  row['VALUE'] = 'AAA'
  p row # => #<CompactCSV::Row "ID":"1" "VALUE":"AAA">
end

• ruby default CSV module: https://github.com/ruby/ruby/blob/trunk/lib/csv.rb

1. Fork it ( http://github.com/rnakano/compact_csv/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request