c++ common data types

type of data The meaning of data type existence: allocate appropriate memory space to variables There are several ways to represent integer types in C++, the difference is that the memory space occupied is different: short (short integer) Occupied space: 2 bytes int (integer) Occupied space: 4 bytes long (long integer) Occupied space: 4 by ...

Posted by simn_stv on Tue, 20 Dec 2022 00:17:37 +0300

Centos7 upgrade openssl-1.1.1s and openssh-9.1p1 (with script)

The main reason is that there was a vulnerability in openssl last month, so the server needs to be upgraded. It is recommended not to upgrade if there is no problem. The main steps are 2, and the script content also contains only the upgrade. 1 and 3 are to enable and disable telnet, it is not recommended to use telnet. 1 Install and start ...

Posted by Tranquilraven on Mon, 19 Dec 2022 19:51:50 +0300

React source code learning advanced beginWork how to deal with Fiber

❝This article uses the source code of React v16.13.1 version for analysis ❞Source code analysisThe code for beginWork is located in packages/react-reconciler/src/ReactFiberBeginWork.js:function beginWork( current: Fiber | null, workInProgress: Fiber, renderExpirationTime: ExpirationTime, ): Fiber | null { const updateExpirationTime = wo ...

Posted by smook on Mon, 19 Dec 2022 12:58:31 +0300

PriorityQueue source code analysis

For reprinting, please indicate the source in the form of a link: This article is from: 103style's blog base on jdk_1.8.0_77Table of contentsIntroduction to PriorityQueuePriorityQueue exampleIntroduction to PriorityQueue's constants and member variablesConstructor of PriorityQueuePriorityQueue related functionssummaryIntroduction t ...

Posted by Idri on Mon, 19 Dec 2022 09:02:05 +0300

Spring Boot basic study notes 03: Spring Boot two global configurations and two annotations

1. Application.properties configuration file 1. Add relevant configuration in application.properties Click on the resource directory to view the application property configuration file Configure tomcat port number and web virtual path #Modify the default port number of tomcat server.port=8888 #Modify the web virtual path server.servlet.conte ...

Posted by nodi on Mon, 19 Dec 2022 08:21:53 +0300

FCM fuzzy clustering algorithm

How to understand fuzzy clustering The boundaries between things, some are clear, others are blurred. When clustering involves fuzzy boundaries between things, fuzzy cluster analysis methods need to be used. How to understand the "fuzziness" of fuzzy clustering: Assume that there are two sets A and B, and one member a. The traditiona ...

Posted by Blob on Sat, 17 Dec 2022 23:51:12 +0300

19 JavaScript one-liners that will make you look like a pro

In today's article, I want to share with you 19 one-line JS tricks that can help us improve our work efficiency and at the same time, make us look more professional. Now, let's enter today's content, spend some time every day, and learn some JS knowledge. 1. Generate a random string We can use Math.random to generate a random ...

Posted by fj1200 on Sat, 17 Dec 2022 21:28:41 +0300

Summary of IPV6 Address Processing

1. Address translation 1. Network address conversion functions inet_pton and inet_ntop These two functions are functions that appear with IPv6, and are applicable to both IPv4 addresses and IPv6 addresses. In the functions, p and n represent expression (presentation) and value (numeric) respectively. The expression format of the address is usu ...

Posted by CG-Sodar on Sat, 17 Dec 2022 00:51:48 +0300

Chapter 27 linux-device tree 2

Chapter 27 linux-device tree 2 What is the device tree device tree, device tree, is a parameter representation and transfer technology used in the linux kerneldts, device tree source, device tree source filedtc,device tree compiler, device tree compilation/decompilation/debugging tooldtb,device tree blob, binary device tree image Why ...

Posted by uday on Fri, 16 Dec 2022 23:38:36 +0300

The table style set by the front-end rich text cannot display the solution

After we have edited the text in the rich text editor, post it to see why the content previewed by the editor is inconsistent with the content actually displayed after saving. This is because most editors have their own style attributes, and these style attributes are often not included when obtaining rich text content, which leads to the incon ...

Posted by Sphynx on Fri, 16 Dec 2022 20:48:08 +0300