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https://bbs.tsingfun.com/thread-841-1-1.html 

C语言面试那些事儿──一道指针与数组问题 - c++1y / stl - 清泛IT社区,为创新赋能!

...言指针较晦涩和难懂的地方。 理解了这两点的话,上述问题则十分简单:a + 1:现在把a看作一个指针,指针+1操作,根据C语言语义,实际增加偏移量的是指针指向类型的长度,即32位机器下的int型,即4字节,故a+1就是&a[1],...
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MySQL主从服务器数据一致性的核对与修复 - 数据库(内核) - 清泛网 - 专注C/...

...性的核对与修复我上一次遇到MySQL主从服务器数据一致性问题,想想是几年前的事情了,还依稀记得当时惊慌失措的情景,好在最后借助Maatkit解决了问题。几年...我上一次遇到MySQL主从服务器数据一致性问题,想想是几年前的事...
https://www.tsingfun.com/ilife/relax/1005.html 

30条爆笑的程序员梗 PHP是最好的语言 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术

...:你可以走了。 我感到很诧异。 我:为什么问这样的问题? 民警:深夜还在街上走,寒酸苦逼的样子,不是小偷就是程序员。 14.烦恼 程序猿最烦两件事,第一件事是别人要他给自己的代码写文档,第二件呢?是别人的程序没...
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Purpose of memory alignment

...y subsystem throughput tightly bound to the execution unit throughput (aka cpu-bound); this is all reminiscent of how PIO mode was surpassed by DMA for many of the same reasons in hard drives. The CPU always reads at its word size (4 bytes on a 32-bit processor), so when you do an unaligned address...
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Why do x86-64 systems have only a 48 bit virtual address space?

...re not going to see a system which needs more than that any time soon. So CPU manufacturers took a shortcut. They use an instruction set which allows a full 64-bit address space, but current CPUs just only use the lower 48 bits. The alternative was wasting transistors on handling a bigger address s...
https://bbs.tsingfun.com/thread-1380-1-1.html 

BLE(一)概述&工作流程&常见问题 - 创客硬件开发 - 清泛IT社区,...

...与前面几代不同的是,蓝牙4.0版引入的BLE协议更注重功耗问题,而非通信速率的提升。这也使得低功耗蓝牙更加节能,能使设备的电池维持很长时间,因此在很多可穿戴设备中得到了应用。 0x2 BLE工作流程0x21 工作过程蓝牙适用...
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Asynchronous vs Multithreading - Is there a difference?

...ver the operation that needs to happen asynchronously does not require the CPU to do work, that operation can be done without spawning another thread. For example, if the async operation is I/O, the CPU does not have to wait for the I/O to complete. It just needs to start the operation, and can the...
https://bbs.tsingfun.com/thread-2307-1-1.html 

CPU acceleration status: UT feature disabled in BIOS/UEFI - App Invent...

安卓模拟器启动报错: CPU acceleration status: UT feature disabled in BIOS/UEFI 86_64仿真当前需要硬件加速CPU加速状态:在BIOS/UEFI中禁用了UT功能 需要在主板中开启硬件加速功能,具体如何开启待整理,或者可以直接问问 deepseek...
https://www.tsingfun.com/it/tech/1807.html 

Mac OS X 入门操作常见问题集锦(持续更新) - 更多技术 - 清泛网 - 专注C/...

Mac OS X 入门操作常见问题集锦(持续更新)如何截图:shift + command + 3 截整屏shift + command + 4 截窗口(默认png,并保存到桌面)shift + command + Ctrl + 4 如何截图: shift + command + 3 截整屏 shift + command + 4 截窗口(默认png,并保存...
https://bbs.tsingfun.com/thread-981-1-1.html 

Discuz与phpsso整合时无法同步登录:通过js load 另一个 script 文件导致的...

...t;/' + 'script>');复制代码通常来说用这个方法是没有什么问题的,但是最近在帮人分析整合 phpcms 与 discuzx 同步登录时,发现在 discuzx 登录后无论如何也没能让 phpcms 同步登录。原因是 dz 的登录采用的是 ajax 方式,ucenter 返回的...