Programmer Group

For online services, there are often bug s in a certain logic of xxx service, which need to be repaired urgently. For stateless services, you can repair them and restart them directly. However, for stateful services, restart means loss of memory state and disconnection of long connections. For example, if the Warcraft server needs to be resta ...

preface String string is a data structure that appears very frequently in our development. I have prepared several small questions here. Whether you are a beginner or an expert, you can try whether you can easily solve the following questions. If you have better solutions, you are welcome to communicate in the comments! How to invert a string ...

reference: JNI learning notes - local and global references          JNI exposes the class instances and array types of the Java layer as opaque references. The code of the native layer will access this opaque reference through the functions provided by JNI. There are different kinds of references in JN ...

https://www.cnblogs.com/bbqzsl/p/15510377.html Recently, during optimization, some functions were bench tested on different compilation platforms . Found a lot of problems. Now let's share one of the questions. 1 typedef float MAFloat; 2 3 MAFloat sma(const MAFloat* seq, const int cnt, const int N, const int M) 4 { 5 const MAFloat C ...

Why use distributed locks? Before discussing this issue, let's look at a business scenario.Why use distributed locks?System A is an e-commerce system. At present, it is deployed on A machine. There is an interface for users to place orders. However, users must check the inventory before placing orders to ensure that the inventory is sufficient. ...

Tmall elf open experimental platform experiment - switching intention, parameter transfer Reference link: AliGenie - skill application platform 1, Create two intentions Then, in the first two experiments, we continue to create new two intentions to realize the speech skills associated with multiple intentions. Through learning, you will ...

subject Problem solving A "binary tree middle order traversal problem", which is unfamiliar to binary tree middle order traversal, I suggest moving first Middle order traversal of LeetCode94 binary tree. Question 94 is to output node values in the form of an array in the order of traversal in the middle order. The differenc ...

Note: This is a draft of a book to be published. You can see it here. For more information, click [read original text] to view. 9.5.2 class is an instance of metaclassWhat is "metaclass"? According to Confucius' saying "review the old and know the new", review the old first and follow the operation of "review the old&qu ...

In daily work, many students' intranet working environment is not allowed to connect to the Internet. When it is necessary to build an intranet development environment, they always need to download the required file package in the extranet environment and install it on the intranet. At this time, if the environment of the intranet and th ...

abstractFirstly, it introduces the application background: it is used to make the domain name correspond to the dynamic IP correctly. Then it introduces the API interfaces needed to complete this function, and simply implements the corresponding API interface call framework. Finally, in order to use more concise, the program logic is further op ...