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WakeLock 拓展：保持App活动状态，不自动关屏 - App Inventor 2 拓展 - 清...
AI2 WakeLock Extension: Always stay active
来源：https://ullisroboterseite.de/android-AI2-WakeLock-en.html
AppInventor2 vs Android Studio - App应用开发 - 清泛IT社区，为创新赋能！
...决？
安卓开发经验是相通的，安卓工程师能极快上手 ai2。ai2 本地版有个特色，编译信息非常清晰，即使出错绝大部分都能解决，不外乎就是代码块写的有问题。只要按照规范写，一般不会出错，即使查不出来的错误，我们技...
串口Read不到数据的问题 - 用户反馈 - 清泛IT社区，为创新赋能！
用户发送的是 8n1 的格式，但是ai2的串口貌似不支持这种格式。写串口正常，读串口为空，len为0。
目前经过测试验证，应该是 \n 作为结束符的。发送时，也是。
ai2使用 physicaloid 库完成的串口功能。
App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
... 教育 入门必读 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索 App Inventor 2 经典蓝牙(SPP) 硬件接入...
How to log PostgreSQL queries?
How to enable logging of all SQL executed by PostgreSQL 8.3?
10 Answers
10
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Remove Primary Key in MySQL
...ROP PRIMARY KEY;
Note that you have a composite PRIMARY KEY which covers all three columns and id is not guaranteed to be unique.
If it happens to be unique, you can make it to be a PRIMARY KEY and AUTO_INCREMENT again:
ALTER TABLE user_customer_permission MODIFY id INT NOT NULL PRIMARY KEY AUTO...
Statistics: combinations in Python
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@robertking - Ok, you were both petty and technically correct. What i did was meant as illustration of how to write one's own function; i knew it is not accurate for big enough N and K due to floating point precision. But we can fix that - see above, now it should not err f...
In MySQL, can I copy one row to insert into the same table?
...an existing row in the table) but I want to do this without having to list all the columns after the "select", because this table has too many columns.
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What's the difference between utf8_general_ci and utf8_unicode_ci?
...languages or characters.
On modern servers, this performance boost will be all but negligible. It was devised in a time when servers had a tiny fraction of the CPU performance of today's computers.
Benefits of utf8mb4_unicode_ci over utf8mb4_general_ci
utf8mb4_unicode_ci, which uses the Unicode r...
项目管理实践【四】Bug跟踪管理【Bug Trace and Management】 - 项目管理 -...
...：BugNET 0.7.921.0
官方主页：http://bugnetproject.com/
最新版本下载：http://downloads.sourceforge.net/bugnet/BugNET-0.7.921-Install.zip
源代码下载：http://downloads.sourceforge.net/bugnet/BugNET-0.7.921-Source.zip
英文文档：http://bugnetproject.com/Documentation/tabid/57/...