practical programming python

Important Concepts Synchronous (synchronous) and asynchronous (asynchronous) Synchronous Wait method returns Asynchronously returns, continuing the next call Concurrency (Concurrency) and parallelism (Parallelism) Concurrency is consistent with parallel external performance Single-core CPUs cannot be parallelized, but can handle parallel transactions Critical section Public resources or shared data Critical section data corruption m

Q1:Number games:Two persons (A, B) a row of board games lined with n integers, the game starts with a, each person has the following actions:(1) Take the right or left-hand piece of the board and erase the removed number from the board.(2) When there are more than two numbers left in the chessboard, you can erase the two numbers on the right or left of the chessboard.When all the numbers on the board disappear, the game ends, who takes the pieces representing the sum of the larger number of peop

established ahead of time, then the task execution is removed from the work queue, execution is completed again waiting for the next task, and worker threads can be reused.Create a thread pool by calling a static method in executors: Newfixedthreadpool newcachedthreadpool newsinglethreadpool NewscheduledthreadpoolLife cycle of Executor: Lifecycle management through Executor sub-interface ExecutorserverDelay tasks and cycle tasks: Timer or Replace with Scheduledthreadpoolexecutor6.3 Finding the

break. Suppose you write a class library that has a method Amethod in the class library, detects and clears the interrupt state in Amethod, and does not throw the interruptedexception, as the Amethod user, he does not know the details, If the user is going to use interrupts to do something after calling Amethod, he will never detect an interruption after calling Amethod, because the interrupt information has been removed by Amethod. What if, as a user, you encounter such a problematic class lib

Six important practical skills in MySQL Programming 1. Each command line ends with a semicolon (;). For MySQL, you must keep in mind that each line of its command is ended with a semicolon (;), but when a line of MySQL is inserted in PHP code, it is best to omit the semicolon, for example: mysql_query("INSERTINTOtablename(first_name,last_name)VALUES('$first_name',$last_name')"); This is because PHP

achieve higher concurrency, the rendering task is first decomposed into two tasks: one is to render all the text, and the other is to download all the images:-6.3.4 limitations in the parallelism of heterogeneous tasks-6.3.5 Completionservice:executor and BlockingqueueCompletionservice combines the functions of executor and blockingqueue, and can submit callable tasks to it for execution, and then uses a take and poll method similar to the queue operation to get the results done. These results

Using mutex classes-mutex locksOwned is true, the initial state of the mutex is acquired by the main thread, otherwise it is not in the acquired stateThe name is defined as the mutex, and in the entire operating system there is only one named Csharpthreadingcookbook mutex, one thread gets, and the other thread cannot get the mutex, only wait.Const string " Csharpthreadingcookbook "; Public Mutex (boolstring mutexname);public Mutex ();WaitOne (): Get, Mut. ReleaseMutex (): Release Public Override

cross the 1000 km desert, the truck consumes 1 liters/* km, and the truck's total oil capacity is 500 litres. The driver managed to set up several oil storage points along the way so that the truck could cross the desert and ask the driver how to set up the fuel storage point. How much petrol should be stored at each oil point in order to allow the truck to pass at the cost of minimum petrol consumption? * * version:1.0 * CREATED:04/25/15 08:57:38 * revision:none * COMPILER:GCC * * A Uthor:xiu

Asp. NET is based on Microsoft's new generation of. NET platform architecture, using the normal language runtime (Common Language Runtime) to provide users with a strong enterprise-class Web Application service programming framework at the back end of the server. The following is a list of the function sets in the 27 commonly used asp.net:1, DateTime Digital type Copy Code code as follows: System.DateTime currenttime=new System.DateTime

This article is mainly in the form of knowledge points to Java multithreading, Learning Java Multi-Threading Foundation, this article refers to the book "Java Concurrency Programming Practical manual", if you are interested in studying and advanced multithreading ideas, you can read "Java Concurrent programming Practical