module EventMachine::Protocols::Memcache

def delete key, expires = 0, &cb


cache.del(:b){ puts "deleted the value!" }
cache.del :a

Delete the value associated with a key 
def delete key, expires = 0, &cb
  callback{
    send_data "delete #{key} #{expires}#{cb ? '' : ' noreply'}\r\n"
    @del_cbs << cb if cb
  }
end