word_count.rb

def word_count(sentence)
  hash = sentence.downcase.gsub(/\W+/, ' ').split(" ").group_by{ |item| item }
  hash.each { |item| hash[item[0]] = item[1].length }
end

p word_count("The quick brown fox jumped over the moon. This mammal did not jump over the sun; it jumped over the moon. And it was quick about it.")

instead of this:

sentence.downcase.gsub(/\W+/, ' ').split(" ").group_by{ |item| item }

Some of our folks figured out this
sentence.downcase.split(/\W+/).group_by{ |item| item }