Sha256: 8357a3e15854fe9b02c68bfa2ff3fa0e02747a9ac70dbec781625584f052be04
Contents?: true
Size: 721 Bytes
Versions: 267
Compression:
Stored size: 721 Bytes
Contents
class Crypto
def initialize(plaintext)
@plaintext = plaintext
end
def normalize_plaintext
@normalized ||= @plaintext.downcase.gsub(/\W/, '')
end
def plaintext_segments
normalize_plaintext.chars.
each_slice(size).
map{ |s| s.join('') }.
to_a
end
def size
Math.sqrt(normalize_plaintext.length).ceil
end
def ciphertext
transposed.join('')
end
def normalize_ciphertext
transposed.join(' ')
end
private
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
Version data entries
267 entries across 267 versions & 1 rubygems