lib/user_agent_parser/parser.rb
def from_pattern_match(keys, pattern, match)
      keys.each_with_index.map do |key, idx|
        # Check if there is any replacement specified
        if pattern[key]
          interpolate(pattern[key], match)
        else
          # No replacement defined, just return correct match group
          match[idx + 1]
        end
      end
    end
def from_pattern_match(keys, pattern, match)
      keys.each_with_index.map do |key, idx|
        # Check if there is any replacement specified
        if pattern[key]
          interpolate(pattern[key], match)
        else
          # No replacement defined, just return correct match group
          match[idx + 1]
        end
      end
    end
Maps replacement keys to their values