squeeze in Ruby.

squeeze.rb

class String
  def squeeze(c)
    s = ""
    now = false
    0.upto(self.size-1) do |i|
      if self[i] == c
        if now
          next
        else
          s << self[i]
          now  =  true
        end
      else
        s << self[i]
        now  =  false
      end
    end
    return s
  end

  def squeeze2(c)
    self.gsub(/#{c}+/,c)
  end

end