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【解决】App Inventor 2 中文版服务启动超时，问题排查 - App Inventor 2 ...
离线版启动失败，报超时错误：
可能性排查如下：
1、安装目录有中文，卸载重新安装，目录不要有中文即可，当然最好也不要有空格。这个逻辑也考虑过做到安装时自动检查，目前有技术细节没解决，后续会继续研究。
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CustomWebView拓展：WebViewer的扩展版本，具有更高的自定义性和灵活性 - A...
...View 中的语句
执行 Js 并获取结果
上传文件到网站
发生错误事件
获取控制台输出
表单重新提交事件
获取内容高度
获取网站的 SSL 证书
获取/设置特定 URL 的 Cookie
权限请求事件和手动授予权限
打印网页内容
丰富的 JavaScr...
mqtt协议一般最大支持订阅几个主题？ - 创客硬件开发 - 清泛IT社区，为创新赋能！
...制是 50个。这是一个非常具体的硬性限制，超过后会收到错误。
结论一：你首先需要查阅你所使用的Broker的文档，来确认其默认行为和最大可配置值。2. MQTT客户端库的限制客户端库（如Paho MQTT）在实现时，理论上也不会设置一...
【解决】Error 701: Unable to load xxx.xxx - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...侣已经连接好之后，访问才刚上传的某资源，就会报这个错误。因为资源不会自动同步到AI伴侣，它必须在AI伴侣连接的时候才能同步过去，因此重新连接一次就好了。
Installing pip packages to $HOME folder
...Python core developers about what is the appropriate directory location on Mac OS X for PEP370-style user installations. In Python 2.7 and 3.2, the location on Mac OS X was changed from $HOME/.local to $HOME/Library/Python. This might change in a future release. But, for now, on 2.7 (and 3.2, if ...
How to convert CFStringRef to NSString?
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If you're using ARC in recent versions of Mac OS X/Objective C,
it's real easy:
NSString *happyString = (NSString *)CFBridgingRelease(sadString);
However, Xcode will happily warn you when you try to toll free bridge
CFString to NSString and offer to automatically ...
how to change default python version?
I have installed python 3.2 in my mac. After I run /Applications/Python 3.2/Update Shell Profile.command , it's confusing that when I type python -V in Terminal it says that Python 2.6.1 , how can I change the default python version?
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How to stop mysqld
To find out the start command for mysqld (using a mac) I can do:
17 Answers
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Installing Java on OS X 10.9 (Mavericks)
I have installed the JDK on Mac OS X v10.8 (Mountain Lion). When I upgraded it to Mac OS X v10.9 (Mavericks) and ran java -version in the terminal, it showed:
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Is there a shortcut on Android Studio to convert a text to uppercase?
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The IntelliJ shortcut is evidently Ctrl+Shift+U (Command+Shift+U on Mac) and should work since Android Studio is based off of it. Here's their documentation page.
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