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- How does InnoDB perform crash recovery?
- InnoDB achieves crash recovery through the following steps: 1. Log playback: read redolog and apply modifications that are not written to the data file to the data page. 2. Roll back uncommitted transactions: Through undolog, roll back all uncommitted transactions to ensure data consistency. 3. Dirty page recovery: handles dirty page writing that is not completed before crash to ensure data integrity.
- Mysql Tutorial . Database 349 2025-04-04 00:06:30
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- What is Reflection API in PHP and give practical examples?
- The Reflection API in PHP allows you to check and manipulate code at runtime. 1) It implements reflection function through classes such as ReflectionClass. 2) The working principle of the reflection API depends on the Zend engine. 3) The basic usage includes checking the class structure. 4) Advanced usage can implement dependency injection containers. 5) Common errors need to be handled through try-catch. 6) Performance optimization suggestions include cache reflection results and avoiding unnecessary reflections.
- PHP Tutorial . Backend Development 393 2025-04-04 00:04:11
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- What is a covering index in MySQL?
- Overriding indexes can significantly improve MySQL query performance. 1) Overwrite index is defined as an index containing all columns required for query, reducing I/O operations. 2) Its working principle uses the B-Tree structure to directly obtain data from the index to avoid returning to tables. 3) Basic usages such as SELECTusername, emailFROMusersWHEREusername='alice', advanced usages can be used for complex query and aggregation operations.
- Mysql Tutorial . Database 203 2025-04-04 00:03:41
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- What are anonymous classes in PHP and when might you use them?
- The main function of anonymous classes in PHP is to create one-time objects. 1. Anonymous classes allow classes without names to be directly defined in the code, which is suitable for temporary requirements. 2. They can inherit classes or implement interfaces to increase flexibility. 3. Pay attention to performance and code readability when using it, and avoid repeatedly defining the same anonymous classes.
- PHP Tutorial . Backend Development 927 2025-04-04 00:02:50
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- What are SPL interfaces (e.g., Iterator, Countable, ArrayAccess) and why use them?
- The SPL interface includes Iterator, Countable and ArrayAccess in PHP. 1. The Iterator interface makes the object traversable and defines the current(), key(), next(), rewind() and valid() methods. 2. The Countable interface allows the object to report the number of elements and defines the count() method. 3. The ArrayAccess interface allows objects to be accessed and modified like arrays, and defines offsetExists(), offsetGet(), offsetSet() and offsetUnset() methods. These interfaces improve code efficiency and maintainability.
- PHP Tutorial . Backend Development 246 2025-04-04 00:01:51
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- What are PHP Attributes (PHP 8 ) and how do they compare to DocBlocks?
- Attributes is a newly introduced metadata annotation feature in PHP8 for embedding additional information in code. It is more structured than DocBlocks and can be processed at runtime. Attributes work through reflection mechanism and are suitable for scenarios such as version tagging, routing definition, etc., and can give full play to their respective advantages in combination with DocBlocks.
- PHP Tutorial . Backend Development 856 2025-04-04 00:01:30
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- What is REST API design principles?
- RESTAPI design principles include resource definition, URI design, HTTP method usage, status code usage, version control, and HATEOAS. 1. Resources should be represented by nouns and maintained at a hierarchy. 2. HTTP methods should conform to their semantics, such as GET is used to obtain resources. 3. The status code should be used correctly, such as 404 means that the resource does not exist. 4. Version control can be implemented through URI or header. 5. HATEOAS boots client operations through links in response.
- PHP Tutorial . Backend Development 297 2025-04-04 00:01:04
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- The Making of: Netlify's Million Devs SVG Animation Site
- The following article captures the process of building the Million Developers microsite for Netlify. This project was built by a few folks and we've captured
- CSS Tutorial . Web Front-end 989 2025-04-03 11:01:09
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- Timer Bars in CSS with Custom Properties
- I was working on a thing the other day that needed a visible timer. There was UI precedent for this type of timer on the project. People didn't want to see
- CSS Tutorial . Web Front-end 728 2025-04-03 10:59:13
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- Making Sense of react-spring
- Animation is one of the trickier things to get right with React. In this post, I’ll try to provide the introduction to react-spring I wish I had when I first
- CSS Tutorial . Web Front-end 918 2025-04-03 10:58:12
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- A Look at What's New in Chrome DevTools in 2020
- I’m excited to share some of the newer features in Chrome DevTools with you. There’s a brief introduction below, and then we’ll cover many of the new DevTools
- CSS Tutorial . Web Front-end 336 2025-04-03 10:57:17
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- What I Learned by Fixing One Line of CSS in an Open Source Project
- I was browsing the Svelte docs on my iPhone and came across a blaring UI bug. The notch in the REPL knob was totally out of whack. I’m always looking to
- CSS Tutorial . Web Front-end 224 2025-04-03 10:52:18
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- Spotting a Trend
- There are tons of smokin' hot websites out there, with an equal or greater number of talented designers and developers who make them. The web is awesome like
- CSS Tutorial . Web Front-end 710 2025-04-03 10:51:11
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- Want to get better at code? Teach someone CSS.
- A friend of mine recently asked me to teach her to code. She was an absolute beginner, having no idea what coding really involves. I decided to start where I
- CSS Tutorial . Web Front-end 246 2025-04-03 10:50:13
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- A Font-Like SVG Icon System for Vue
- Managing a custom collection of icons in a Vue app can be challenging at times. An icon font is easy to use, but for customization, you have to rely on
- CSS Tutorial . Web Front-end 320 2025-04-03 10:47:09
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