Rotate right : String class Extension « String « Ruby

1. Ruby
2. String
3. String class Extension

Rotate right

class String
  def rotate_right(n=1)
    n=1 unless n.kind_of? Integer
    n.times do
      char = self.pop
      self.unshift(char)
    end
    self
  end
  def pop
    return nil if self.empty?
    item=self[-1]
    self.chop!
    return nil if item.nil?
    item.chr
  end
  def unshift(other)
    newself = other.to_s.dup.pop.to_s + self
    self.replace(newself)
  end  
end

a = "this is a test"

puts a.rotate_right

 

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