Sha256: 3094d2927b042653a47bca52f1161bd88fa1b0113d18d46704f105470f3f33a3
Contents?: true
Size: 655 Bytes
Versions: 396
Compression:
Stored size: 655 Bytes
Contents
module Atbash
MAPPING = (alp = ('a'..'z').to_a).zip(alp.reverse).to_h
extend self
def encode(message : String) : String
message = sanitize_message(message)
enarr = map_chars(message)
add_spaces(enarr)
end
private def sanitize_message(message : String) : String
message.downcase.gsub(/[^a-z0-9]/, "")
end
private def map_chars(message : String) : Array(Char)
message.chars.map { |c| MAPPING[c]? || c }
end
private def add_spaces(chrs : Array(Char)) : String
encoded_string = ""
chrs.each_with_index do |c, i|
encoded_string += ((i % 5 == 0 ? " " : "") + c)
end
encoded_string.strip
end
end
Version data entries
396 entries across 396 versions & 1 rubygems