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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11245

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Shangxuetang MySQL video tutorial

Course Advanced 17581

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Band of Brothers front-end example display video tutorial

Course Advanced 11291

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

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Does "select exists" still return true in my function?

I slightly modified the SelectExists function I found on stackoverflow, but no matter what I try, my function below always returns $sqlResult as true. Even though I only keep two entries in the database. Are Selectexists still valid? None of the answers suggested by the stackoverflow system answered my question, instead suggesting using a method that checks the number of rows returned instead of using exists. (Or the link they gave doesn't really explain what the exists result represents.

2024-03-28 10:14:58

PHP syntax: decoding the meaning behind symbols

What's this? This is a collection of questions that come up from time to time regarding PHP syntax. This is also a community wiki, so everyone is invited to participate in maintaining this list. why is that? It used to be difficult to find questions about operators and other syntax markers. ¹The main idea is to provide links to existing questions on StackOverflow so that we can refer to them more easily, rather than copying content from the PHP manual. Note: As of January 2013, StackOverflow supports special characters. Just enclose the search term in quotes, e.g. [php]"==

2023-10-10 14:59:04

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Big rollover! StackOverflow moderators go on strike!

Course Introduction：Author | Xu Jiecheng One of the world's most popular developer Q&A forums, StackOverflow, has had a big incident again! Recently, it has fallen into a new crisis - more than 700 moderators have recently jointly announced that they will hold a collective strike to protest StackOverflow's new policy on the regulation of artificial intelligence-generated content. According to the new policy description, in most cases, StackOverflow moderators will no longer have the power to modify or delete artificial intelligence-generated content. The two key contradictions are that, first, moderators feel unable to perform their quality inspection duties due to the impact of the new policy; second, this new policy is enforced without consultation. 1. AI New Deal: Take back power and align AI

2023-06-06 comment 0 684

How to solve stackoverflow error

Course Introduction：Solutions to stackoverflow error: 1. Check the recursive function; 2. Optimize the recursive algorithm; 3. Increase the stack size; 4. Use iteration instead of recursion; 5. Analyze the call stack; 6. Code review; 7. Use debugging tools; 8. Simplify the problem; 9. Find similar problems; 10. Update your development environment; 11. Execute code step by step; 12. Use exception handling; 13. Avoid unnecessary object creation; 14. Consider using other programming languages; 15. Seek professional help.

2023-12-14 comment 0 2015

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