compare2.rb

# game.rb
require 'pry'
class Compare
    def self.run(s, o)
      s_off = 0
      o_off = 0

      return 0 if compare(s, s_off, o, o_off) == 0
      s_head = ''
      o_head = ''
      s_length = label_count(s,s_off)
      o_length = label_count(o,o_off)
      while compare(s, s_off, o, o_off) != 0
        s_head, s_off = progress(s, s_off) if s_length >= o_length
        o_head, o_off = progress(o, o_off) if s_length <= o_length
        s_length = label_count(s,s_off) unless s_length == 0
        o_length = label_count(o,o_off) unless o_length == 0
        # puts "s_length:#{s_length} : s_off #{s_off} : o_length:#{o_length}  : o_off #{o_off}"

        break if s_length == 0 && o_length == 0
      end
      puts "exit: #{s_head} <=> #{o_head} : #{s_head <=> o_head}: #{compare(s, s_off, o, o_off)}"
      s_head <=> o_head
    end

    def self.label_count(s, off)
      s[off..-1].gsub(/\D/, ',').split(',').count
    end

    def self.compare(s, s_off, o, o_off)
      # puts "#{s[s_off..-1]} <=> #{o[o_off..-1]} = #{s[s_off..-1] <=> o[o_off..-1]}"
      s[s_off..-1] <=> o[o_off..-1]
    end

    def self.progress(string, off)
      length = string[off].to_i
      start = off + 1
      ending = start + length
      head = string[start...ending]
      off = off + 1 + length
      [head, off]
    end
 end