Rendezvous with Cassidoo challenge 19-02-2024

heterogram.rb

# frozen_string_literal: true

class HeterogramProductMaximizer
  attr_accessor :words

  def initialize(words)
    @words = words
    @product = 0
  end

  def find!
    words.each do |word|
      le = longest_exclusive(word)

      @product = [@product, word.length * le.length].max
    end
    puts [@product, '#', words.join(', ')].join(' ')
  end

  def longest_exclusive(word)
    @winner = ''
    words.each do |candidate|
      @winner = candidate if heterogram?(word, candidate)
    end
    @winner
  end

  def heterogram?(word, candidate)
    candidate.length > @winner.length &&
      word.chars.intersection(candidate.chars).empty?
  end
end

lists = [
  %w[fish fear boo egg cake abcdef],
  %w[cat dog fish bird elephant],
  %w[moon sun star planet galaxy],
  %w[apple banana orange grape kiwi]
].each { |list| HeterogramProductMaximizer.new(list).find! }