亚洲AV福利天堂在线观看

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:Winter is the season of the year when lobsters are fewest, But the price is high, In recent years, From September 1 to December 31, the wild crayfish will be banned. This policy has always been in place, But I haven't seen the execution. Due to the habit of digging shrimps in winter, When people dig it, because they don't raise it by themselves, they don't have to put back the small eggs. It belongs to extinct fishing. Unless it is not found, it will also result in fewer and fewer lobsters in the second year. This is basically the pattern in recent years. The overfishing of people with high prices in the previous year will result in a large reduction in production in the second year. This person who often catches lobsters has deep experience. In recent years, it is more and more difficult to catch lobsters year by year.但是彻生没有死亡的记忆。据说是从公司的屋顶上掉下来的，事故？自杀，两人都不记得了，无法释怀。此时此刻，自己只剩下一座临淄城，虽然有三十万大军在手，但困守孤城，迟早都是个死。陈老太太点头道：买得好。