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https://bbs.tsingfun.com/thread-2234-1-1.html 

代码块超过1.2w编译apk报错问题 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

报错信息: 3月 04, 2025 9:50:11 上午 com.google.appengine.tools.development.ApiProxyLocalImpl log 严重: javax.servlet.ServletContext log: Exception while dispatching incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract long com.google.appinv...
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BLE(二)信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区,...

...们常说的“温度”、“湿度”等人类可识别的术语,通过UUID进行区分。Attribute Handle是一个16-bit的数值,用作唯一识别Attribute server上的所有Attribute。Attribute Handle的存在有如下意义: 一个server上可能存在多个相同type的Attribute,...
https://www.tsingfun.com/it/cpp/1371.html 

PHP报错:Only variables should be passed by reference - C/C++ - 清泛网 - 专注C/C++及内核技术

PHP报错:Only variables should be passed by reference错误信息如下:Strict Standards: Only variables should be passed by reference in D: wamp ecshop includes cls_template.php...错误信息如下: Strict Standards: Only variables should be passed by reference in xxx\ecshop\includes\c...
https://www.tsingfun.com/it/tech/1643.html 

PHP连接MySQL报错:Fatal error: Call to undefined function mysql_connec...

PHP连接MySQL报错:Fatal error: Call to undefined function mysql_connect()之解决方法【问题描述】PHP测试连接MySQL的程序如下:<?php$host='localhost';$user_name='root';$password='mysql';$conn=m...【问题描述】 PHP测试连接MySQL的程序如下: <?php $host='localh...
https://bbs.tsingfun.com/thread-1845-1-1.html 

App Inventor 2 做个计算器怎手机运行后报错 - App应用开发 - 清泛IT社区,为创新赋能!

做个计算器怎手机运行后报错 什么原因呢?根据报错字面,2.63...除以 0 异常,一定要对除数进行非零的判断,使用数学代码块=0 判断。当输入框没有输入内容时,数学运算会转成 0 处理,因此就会出现除零异常。要先用文本块...
https://bbs.tsingfun.com/thread-2634-1-1.html 

为什么“Screen1.初始化”方法报错? - App应用开发 - 清泛IT社区,为创新赋能!

Q:为什么“Screen1.初始化”方法报错? A:可以点击红色叉叉查看报错具体原因。不过这里一看就是方法重复定义导致的。也就是有两个这个方法,去掉一个就行了。
https://bbs.tsingfun.com/thread-2760-1-1.html 

apk安装不了,报错:解析软件包时出现错误 - 用户反馈 - 清泛IT社区,为创新赋能!

用户反馈 编译成 apk 后,安装不了,报错:解析软件包时出现错误。 后因去掉了已删除组件的代码块就 ok 了,代码块的问题,编译没有报错。仅此记录一下。
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Extract subset of key-value pairs from Python dictionary object?

...works in 2.7 too): {k: bigdict[k] for k in ('l', 'm', 'n')} Update: As Håvard S points out, I'm assuming that you know the keys are going to be in the dictionary - see his answer if you aren't able to make that assumption. Alternatively, as timbo points out in the comments, if you want a key tha...
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Does PostgreSQL support “accent insensitive” collations?

... unaccent() always substitutes a single letter: SELECT unaccent('Œ Æ œ æ ß'); unaccent ---------- E A e a S You will love this update to unaccent in Postgres 9.6: Extend contrib/unaccent's standard unaccent.rules file to handle all diacritics known to Unicode, and expand ligatures cor...
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离线版启动超时,有报错日志 - App Inventor 2 离线版 - 清泛IT社区,为创新赋能!

web服务启动报错: Picked up JAVA_TOOL_OPTIONS: &quot;-Dfile.encoding=UTF-8&quot; Executing [D:\appinventor\AppInventor2\resources\app.asar.unpacked\OpenJDK\bin\java, --add-opens=java.base/java.lang=ALL-UNNAMED, -Xmx4G, --add-opens, java.base/java.net=ALL-UNNAMED, --add-opens, java.base/sun.ne...