Now the toilet is public, whether at home, unit, or train station, or on the train. It is therefore a critical resource.
For critical resources, it is inevitable to produce competition. For example, after a certain period of time, everyone wants to go to the toilet.
It has a latch on the door of each lattice in the toilet to lock. So, when you walk into this lattice, insert your door, you can concentrate on do what you like to do. At this time, no matter how strong the big man outside, he can't pull the door, pulling it on your head or seeing your wide coat to solve the red ear. Because you are locked, you have this critical resources.
Therefore, friends, go to the toilet must insert. When developing programs, you should also lock your data or files, otherwise it will be difficult. :)
