girishkvs

def palindrome? (string)
  filtered = string.downcase.gsub(/\W/,'')
  filtered.reverse == filtered
end

def count_words (sentence)
  words = sentence.downcase.split(/\W/)
  result = {}
  words.uniq.select{ |w| !w.empty? }.each do |e|
    result.store(e, words.count(e))

girishkvs

class CartesianProduct
  include Enumerable
  
  def initialize(a,b)
    @values = []
    @values = a.product(b) unless b.empty?
  end
  
  def each(&block)
    @values.each {|v| yield v}