Github/sub_strings.rb at master · chadru/Github · GitHub

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def caesar_cipher(string, shift)
  return_ord_array = []
  cipher_shifted = []
  final_array = []


  # need to downcase string to convert to ordinal
  string_array = string.downcase.split('')

  #converate string to ord and push to return_ord_array
  for i in string_array
    return_ord_array.push(i.ord)
  end
  #logic to move letters that run past z with shift
  for i in return_ord_array
    if i < 97 || i > 122
    cipher_shifted.push(i)
    elsif i + shift > 122
      x = i + shift
      y = x - 122
      cipher_shifted.push(96 + y)
    else cipher_shifted.push(i + shift)
    end
  end
    #recombine for final message
  for i in cipher_shifted
      final_array.push(i.chr)
  end

  puts " First combo string array changed to ord #{return_ord_array}"
  puts " combined cipher ord numbers #{cipher_shifted} "
  puts " Final message encryption #{final_array.join('')} "

end
caesar_cipher("What a string!", 5)