CSV から値を取得するのに便利なクラス

csv_rows.rb

require 'csv'
require 'forwardable'

class CSVRows
  extend Forwardable

  attr_reader :csv_path
  def_delegators :each, *Enumerable.instance_methods(false)

  def initialize(csv_path)
    @csv_path = csv_path
  end

  def each
    return enum_for(:each) unless block_given?

    File.open(csv_path, 'rb:Shift_JIS:UTF-8', undef: :replace) do |f|
      CSV.new(f).each do |row|
        yield(row)
      end
    end
  end
end