Programmer Think

Java notes Java data type - basic type Character type Char Character type, which takes up 2 bytes. Only a single character is allowed. Character quotation marks are forced to use single quotation marks char a = 'a'; Forced digital conversion of Char Use Char to cast numbers to output Unicode values of corresponding characters ...

With the popularity of Vue3, more and more projects have begun to use Vue3. In order to quickly enter the development state, I recommend a set of enterprise level development scaffolding out of the box. The framework uses: Vue3 + Vite2 + TypeScript + JSX + Pinia(Vuex) + Antd. If you don't talk much nonsense, just start rolling.The scaffold is d ...

Bolt is a key value database implemented in pure go language, which supports complete ACID practical operation. Although it does not have a perfect query language like SQLite, the interface is simple and easy to use. Bolt itself manages data by using a memory mapped disk file. The logic is clear and the interface is simple and easy to use. The ...

The classical "poor cow" problem is described in C language subject Problem description Farmer John has n (n ≤ 10000) cows. However, because they produced too little milk, the farmer was very dissatisfied with them and decided to make the least milk into beef jerky every day. But still a little reluctant, John plans to be mercif ...

When learning becomes a habit, knowledge becomes common sense. Thank you for your likes, collections and comments.The new video and articles will be sent to WeChat official account for the first time. Li YongningThe article has been included in github warehouse liyongning/blog , welcome to Watch and Star.targetDeeply understand the implementati ...

Security Level: LOW Brute Force Source code analysis: <?php if( isset( $_GET[ 'Login' ] ) ) { // Get username $user = $_GET[ 'username' ]; // Get password $pass = $_GET[ 'password' ]; $pass = md5( $pass ); // Check the database $query = "SELECT * FROM `users` WHERE user = '$user' AND password = '$pass';"; ...

Why use C + + to develop MCU program In the embedded system with microprocessor as the core, most of them use C language for program design, but with the increase of system scale, the program is more and more complex and maintenance is more and more difficult. Using C + + for development has the following advantages (provided that the compiler ...

13.MyBatis caching mechanism 1. Why cache? When users frequently query some fixed data, they query these data from the database for the first time and save them in the cache. When users query these data again, they do not need to query through the database, but query in the cache. Reduce the loss caused by network connection and database quer ...

Multithreading advanced Six states of threads in virtual machine New status (NEW) -- create thread objectReady state (runnable) -- start methodBlocked ------------- unable to get lock objectWaiting -- waiting methodTimed_waiting -- sleep methodTerminated -------------- all codes have been run Thread pool code implementation Create a poo ...

Josephu Joseph Ring – the leading out of one-way ring linked list Josephu's problem is: let n people with numbers 1, 2,... N sit around. It is agreed that the person with number k (1 < = k < = n) will count from 1, and the person who counts to m will be listed. Its next person will count from 1, and the person who counts to m will ...