Sha256: 4b10279b933e1138044cb9d5d7ef9123507877d527f152664c867b61aa4425e1
Contents?: true
Size: 752 Bytes
Versions: 129
Compression:
Stored size: 752 Bytes
Contents
class Crypto
def initialize(plaintext)
@plaintext = plaintext
end
def ciphertext
transposed.join(' ')
end
private
def normalize_plaintext
@normalized ||= @plaintext.downcase.gsub(/\W/, '')
end
def plaintext_segments
if size > 0
normalize_plaintext.chars.
each_slice(size).
map{ |s| s.join('') }.
to_a
else
[]
end
end
def size
Math.sqrt(normalize_plaintext.length).ceil
end
def transposed
chunk_size = size
chunks = plaintext_segments.map do |s|
Array.new(chunk_size) { |i| s[i] or ' ' }
end
chunks.transpose.map{ |s| s.join('') }
end
end
module BookKeeping
VERSION = 1
end
Version data entries
129 entries across 129 versions & 1 rubygems