波多野结衣全集

Handle (Handle or Descriptor, referred to as Handle under Windows and Descriptor under Linux): Essentially represents a resource (such as file descriptor or socket descriptor for network programming) provided by the operating system; This resource is used to represent events one by one, which can come from both the outside and the inside. External events such as the client's connection request, the data sent by the client, etc.; Internal events such as timing events generated by the operating system. It is essentially a file descriptor, and Handle is the birthplace of events.6. (1) under anything of these rules, a ship which is required not to obstruct the passage or safe passage of another ship shall take early action to set aside sufficient waters for the safe passage of another ship according to the needs of the prevailing environment.Not willing to speak, speaking significantly reduced and finally stopped completely;Good book!From the above command class code, we can see that any operation has an execute method to perform the operation. The above code uses traditional object-oriented programming to implement the command mode. The procedural request call of the command mode is encapsulated in the execute method of the command object. Have we found the above writing code a little cumbersome? We can do this using the callback functions in javascript, In object-oriented, The receiver of the command mode is saved as an attribute of the command object, and the command execution operation is agreed to call the command.execute method. However, if we use the callback function, then the receiver is closed in the environment where the callback function is generated, and the execution operation will be simpler. Only the callback function can be executed. Let's look at the following code:To be honest, I don't know why I have to divide it so carefully.