A Ruby library providing a comprehensive set of utilities for manipulating and processing CSV files. This library offers a robust set of tools for comparing, transforming, sorting, and managing CSV data efficiently.

• CSV Comparison: Compare two CSV files and identify differences (creates, updates, and deletes)
• CSV Transformation: Transform CSV data with customizable rules
• CSV Sorting: Sort CSV files based on specified columns
• CSV Reporting: Generate reports from CSV data
• CSV Iteration: Efficient iteration over CSV files
• CSV Extension: Extend CSV files with additional data
• CSV Wrapper: Convenient wrapper for CSV operations

Add this line to your application's Gemfile:

gem 'csv-utils'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install csv-utils

require 'csv_utils'

comparator = CSVUtils::CSVCompare.new('primary.csv', ['updated_at']) do |src, dest|
  src['id'] <=> dest['id']
end

comparator.compare('secondary.csv') do |action, record|
  case action
  when :create
    puts "Create: #{record}"
  when :update
    puts "Update: #{record}"
  when :delete
    puts "Delete: #{record}"
  end
end

sorter = CSVUtils::CSVSort.new('input.csv')
sorter.sort('output.csv', ['id', 'name'])

transformer = CSVUtils::CSVTransformer.new('input.csv')
transformer.transform('output.csv') do |row|
  # Transform row data
  row['new_column'] = row['old_column'].upcase
  row
end

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests.

Bug reports and pull requests are welcome on GitHub at https://github.com/yourusername/csv-utils.

The gem is available as open source under the terms of the MIT License.