Palindrome.rb

#My anwer for https://www.interviewcake.com/question/ruby/permutation-palindrome

class Palindrome
  def self.test_string(text)
    characters = text.split(//)
    odd_char = characters.select {|char| characters.count(char).odd?}.uniq
    if odd_char.count == 1 or odd_char.count == 0
     true
    else
      false
    end
  end

  def self.test_all
    strings = ['civic', 'ivicc', 'civil', 'livci', 'racecar','a but tuba', 'notpalindrome']
    strings.each do |string|
      puts "#{string}: #{Palindrome.test_string(string)}"
    end
  end
end