Class: Rot13

Inherits:
Object
  • Object
show all
Defined in:
lib/rot13.rb

Overview

file: rot13.rb

Class Method Summary collapse

Class Method Details

.rotate(s, deg = 13) ⇒ Object 



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# File 'lib/rot13.rb', line 7

def self.rotate(s,deg=13)

  a = ('a'..'z').map.with_index{|x,i| [x.chr,i] }

  r = s.split(//).map do |x| 
    item = a.assoc(x.downcase)
    c = item ? a.rotate(deg)[item.last].first : x
    x == x.downcase ? c : c.upcase
  end
  
  r.join
end