Simple Anagram with Ruby

anagram.rb

def anagram(str1, str2)
  if str1.nil? || str2.nil? || str1.empty? || str2.empty?
    return false
  end

  demo1 = str1.split("").sort
  demo2 = str2.split("").sort
  test1 = noirmalise(demo1)
  test2 = noirmalise(demo2)

  test1.join == test2.join 
   
end


def noirmalise (data)
  data.join.scan(/[a-z]/)
end



# puts '===== Positive cases ======'
puts anagram('google', 'ggoole')

# puts '===== Negative cases ======'
puts anagram('google', 'yahoo')


puts anagram('', '')