A ruby implementation for Josephus problem

joseph.rb

Array.class_eval do
  def joseph(k, m)  
    people = ((k - 1) + (m - 1)) % length    
    puts delete(self[people])    
    
    while(length > 1) do    
      people = (people + (m - 1)) % length
      puts delete(self[people])
    end  
  
    puts self.first
  end  
end