Directory title 1. Introduction 1.1 Overview of the importance of semaphores 1.2 Purpose of this article: Compare System V and POSIX semaphores 2. Basics of Semaphores 2.1 Definition and Function of Semaphores 2.2 The role of semaphores in process synchronization (Role in Process Synchronization) Synchronization and Mutual Exclusion The similarity between the psychology of semaphores […]
Tag: difference
Discuss in detail the difference between the sliding window algorithm and the KMP algorithm and the scenarios in which they are used.
What is the sliding window algorithm The sliding window algorithm is an algorithm for solving subarray (or substring) problems within an array (or string). The algorithm works by maintaining a fixed-size window (usually two pointers) that slides over the array to find subarrays that match specific criteria. The basic idea of the algorithm is to […]
Let’s talk about toRef, toRefs, and their differences
toRef: Create a new Ref variable and convert a field of the Reactive object into a Ref variable toRefs: Create a new object, each of its fields is the Ref variable of each field of the Reactive object Tell me about toRef First define a reactive object interface Member {<!– –> id: number name: string […]
The difference between Centos6 and Centos7 systems
Table of Contents 1. System type 2. Service management 3. File system 4. File structure 5. Desktop system 6. Host name 7. Check the system version 8. Time synchronization 9. Firewall 10. Login prompt 11. Character set 12. Time zone setting 13. Regional settings 14. grub (GRand Unified Bootloader) 15. Kernel 16. Database 17. Network […]
The difference between _cdecl and _stdcal and the function of extern “c
Article directory Purpose _stdcal _cdecl result dll extern “c” Replenish Purpose 1) Understand the difference between _cdecl and _stdcal under Windows, so that you can better use modified functions to make function calls. There are several calling methods, divided into C style and Pascal style. The overall difference. _cdecl (c/c++ default, supports variable parameter functions, […]
Java collection ConcurrentHashMap What is the difference between how to use each method and HashMap through source code analysis?
Table of Contents Hello friends, today I will analyze the thread-safe hashmap. The main features of ConcurrentHashMap include: ConcurrentHashMap example Let’s take a look at the source code of the size(), containsKey(), and replace() methods. Okay, let’s continue to look at the replace method. The first thing is to check whether a null pointer exception […]
Vue skills revealed: The difference and performance comparison between v-show and v-if are clear at a glance
Jiangcheng Cheerful Pea: Personal homepage Personal column :《VUE》《javaScript》 Personal website : “Jiangcheng Cheerful Pea” The ideal of life is for an ideal life! Table of Contents ? Column introduction Article introduction 1. Common points between v-show and v-if 2. The difference between v-show and v-if 3. Analysis of v-show and v-if principles v-show principle v-if […]
The syntax difference between Vue2 and Vue3
1. Create Vue2 project —Use @vue/cli scaffolding to quickly create projects (packaging method webpack) —Vetur plug-in (VS code) >>>npm create project name —npm run serve project startup command The project structure is as follows Vue2The basic page numberStructure is as follows HTML-js-CSS <template> <div id=”app”> <span>This is a vue2 page</span><br/> <span>Age is {<!– –>{age}} years […]
An article explains the difference between Token, Cookie and Session
Last week, we used jwt (Json Web Token) token, a no-session method, for user account verification for the first time within the team. We found that many articles on the Internet introduced token incorrectly, so we made some changes to cookies, sessions, and tokens. Let’s compare it (token in the article refers to jwt token) […]
The difference between socket programming under windows and linux＜Reprint＞
If there is no other explanation, the Linux mentioned in this article refers to the 2.6 kernel Linux and the GCC compiler, and the Windows refers to the Windows XP system and the Visual Studio 2005 sp1 compilation environment. The following is from the reposted blog park The following is roughly divided into several aspects: […]