Course Introduction：Efficient Combination Generation in C : A Comparative StudyCombinations and permutations are essential concepts in various domains. C offers a...
2024-11-28 comment 0 550
Course Introduction：Library Function for Permutation and Combination in C Question:What is the most frequently utilized C library to generate all combinations and...
2024-12-01 comment 0 429
Course Introduction：Optimizing image resources in Vue applications requires starting from three aspects: format selection, lazy loading and distribution strategies. 1. Use WebP format to replace PNG/JPG, and automatically generate and fall back through the construction tool; 2. Enable lazy loading, combine IntersectionObserver or component library, configure placeholder maps and exclude the content on the first screen; 3. Introduce CDN distribution as needed, call tool function stitching paths uniformly, and access object storage acceleration services; 4. Compress pictures before uploading, and further reduce the size in combination with automation tools or CI/CD processes.
2025-07-10 comment 0 616
Course Introduction：The recommended way to convert a string to an integer in C is to use the std::stoi function. 1.std::stoi is the simplest and most direct way in modern C (C 11 and above). It is defined in a header file and can automatically handle most cases, but will throw exceptions. It needs to be used in combination with try-catch; 2.atoi is a C standard library function, which accepts constchar* type, which is simple to use but poor error handling ability, and returns 0 when encountering illegal characters; 3.std::istringstream provides a more flexible parsing method, suitable for complex parsing scenarios, but has a slightly lower performance. Choose the appropriate method according to your needs, and recommend std::stoi first.
2025-07-09 comment 0 955
Course Introduction：The MySQL dual master hot standby solution based on Keepalived ensures that the database service is not interrupted. 1. Keepalived monitors the database instance, and switches the VIP to the backup library when the main library fails; 2. MySQL replication function (such as GTID) ensures the synchronization and consistency of the data of the two main libraries; 3. Keepalived relies on the heartbeat package to detect the status of the main node through the VRRP protocol, and switches the VIP according to the configuration parameters (priority, detection interval, etc.). Carefully configures to avoid the phenomenon of split brain; 4. A script is required to monitor the MySQL status and troubleshoot problems in combination with logs; 5. High availability requires selecting appropriate hardware, regular backups, reasonable monitoring, and continuous maintenance and optimization.
2025-04-08 comment 0 1148
Course Elementary 13749
Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.
Course Elementary 82262
Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).
Course Elementary 13133
Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.
Course Elementary 24578
Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.
Course Elementary 27437
Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.
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