Descrifalo!

find_replacer.rb

class FindReplacer < AbstractModifier
  attr_reader :regexp, :replacement_rules

  def initialize(original_value, replacement_rules={})
    @original_value = original_value
    @replacement_rules = replacement_rules
  end

  def modify
    values = original_value.map do |value|
      replaced = nil
      replacement_rules.each do |regexp, substitute_value|
        replaced = value.gsub!(regexp, substitute_value)
      end
      replaced.present? ? value : nil
    end.compact

    values
  end
end