Module: Ciphers

Defined in:
lib/ciphers.rb,
lib/ciphers/autokey.rb,
lib/ciphers/version.rb,
lib/ciphers/vigenere.rb

Defined Under Namespace

Classes: Autokey, Vigenere

Constant Summary collapse

LATIN = 
('A'..'Z').to_a
VERSION = 
"0.2.0"

Class Method Summary collapse

Class Method Details

.alphabet_from(string) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/ciphers.rb', line 8

def self.alphabet_from(string)
  raise ArgumentError.new("Argument must be at most #{LATIN.length} characters long") unless string.length <= 26
  chars = string.upcase.chars
  raise ArgumentError.new("Argument must not contain duplicate letters") unless chars.uniq == chars
  if chars.length < 26
    chars + (LATIN - chars)
  else
    chars
  end
end