Programmer Help

Use three sets to represent the names of students who choose courses in three disciplines (a student can choose multiple courses at the same time) biology = {'stu1', 'stu3', 'stu5', 'stu6', 'stu8', 'stu10', 'stu11'} chemistry = {'stu1', 'stu2', 'stu4', 'stu5', 'stu6', 'stu7', 'stu9'} physics = {'stu3', 'stu4', 'stu5', 'stu7', 'stu10', 'stu11', ...

1, Introduction Multithreading and thread pool are commonly used in Java development to improve program running efficiency and machine utilization. Python multithreading uses Parallel class and Multiprocessing class. In addition, there are  _ Thread, threading and many other thread related classes can cooperate with os, sys, subprocess an ...

Using the new feature of HTML5 to drag and drop to exchange table cell elements What's new in HTML5: drag and drop Drag and drop Drag and Drop is a very common feature. It means you grab something and drag it into different positions. Drag and drop is part of the HTML5 standard: any element can be dragged and dropped. Browser support The ...

Definition of stack Stack is a linear structure with limited operation (first in and last out). It is only allowed to enter and exit from one end. This is the characteristic of the stack. Generally, the end of data in and out is called the top of the stack, and the other end is the bottom of the stack. The basic operations of the stack include ...

reference material: Ceph's RADOS design principle and Implementation https://docs.ceph.com/en/latest/rados/operations/crush-map/ http://strugglesquirrel.com/2019/02/02/ceph%E8%BF%90%E7%BB%B4%E5%A4%A7%E5%AE%9D%E5%89%91%E4%B9%8B%E9%9B%86%E7%BE%A4osd%E4%B8%BAfull/ https://docs.ceph.com/en/latest/rados/operations/balancer/#modes CRUSH Crush alg ...

1, Use The visible area is the area visible to the naked eye of our web browsing device, as shown in the figure below In daily development, we often need to judge whether the target element is within the window or the distance from the window is less than a value (e.g. 100 px), so as to realize some common functions, such as: Lazy loadi ...

Java SE project closure Java development program java se project - development team scheduling software [based on text interface] Look at the effect Company member status after adding Before development As for why this project is written or implemented, it is because the previous socket chat room project is complex, but to be ho ...

preface This paper includes array operation method, new array function in ES6, JS matrix, typed array, etc; Is the catalogue clear? It's convenient to check something? I've tried my best to improve the catalogue for future reference The front is the basic part. If you're not Xiaobai, I think 1, Create & & initialize array C ...

👋 This paper sorts out some practical JavaScript single line code, which is very easy to use~~ Gets the value of the browser Cookie Find the cookie value through document.cookie const cookie = name => `; ${document.cookie}`.split(`; ${name}=`).pop().split(';').shift(); cookie('_ga'); // Result: "GA1.2.1929736587.1601974046" ...

The difference between synchronous and asynchronous Synchronization: in the synchronization process of multiple threads, only one thread is working and other threads are waiting. This process is single threaded (serial) Asynchronous: multiple threads are running at the same time, each doing its own thing (parallel) 8.1. Concept of program, pro ...