Class: Valerii

Inherits:

Object

• Object
• Valerii

Defined in:

lib/valerii.rb

Constant Summary

ENCODE_CHARS =

%w( B C D F G H J K 
M N P Q R S T V 
W Z b c d f h j
k m n p r x t v )

DECODE_MAP =

ENCODE_CHARS.to_enum(:each_with_index).inject({}) do |h,(c,i)|
  h[c] = i; h
end

Class Method Summary

• .decode(string) ⇒ Object

  Decode a string to an integer.

• .encode(number, opts = {}) ⇒ Object

  Encodes an integer into a string.

Class Method Details

.decode(string) ⇒ Object

Decode a string to an integer

Valerii.decode("KJ") # => 1234

# File 'lib/valerii.rb', line 31

def self.decode(string)
  string.split(//).map { |char| 
    DECODE_MAP[char] or return nil 
  }.inject(0) { |result,val| (result << 5) + val }
end

.encode(number, opts = {}) ⇒ Object

Encodes an integer into a string

Valerii.encode(1234) # => "KJ"

# File 'lib/valerii.rb', line 19

def self.encode(number, opts = {})
  str = number.to_s(2).reverse.scan(/.{1,5}/).map do |bits|
    ENCODE_CHARS[bits.reverse.to_i(2)]
  end.reverse.join

  return str
end