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How do I enable index downloads in Eclipse for Maven dependency search? [duplicate]
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In Eclipse, click on Windows > Preferences, and then choose Maven in the left side.
Check the box "Download repository index updates on startup".
Optionally, check the boxes Download Artifact Sources and Download Artifact JavaDoc.
Click OK. The warning won't appear ...
What do {curly braces} around javascript variable name mean [duplicate]
...s available in ES6 (use esnext option) or Mozilla JS extensions (use moz) and this however after reading it I still don't understand why it is used
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Unicode and UTF-8 - C/C++ - 清泛网 - 专注C/C++及内核技术
Unicode and UTF-8Unicode预订的编码空间大小为0x0-0x10FFFF，最多可以容纳1114112（100多万）个字符，实际上并不能使用这么多的空间，于是编码方式出现了两...Unicode预订的编码空间大小为0x0-0x10FFFF，最多可以容纳1114112（100多万）个字符...
安装Adobe cs6出错：“please uninstall and reinstall the product” - 更...
安装Adobe cs6出错：“please uninstall and reinstall the product”---------------------------配置错误---------------------------请卸载并重新安装该产品。如果此问题仍然存在，请与 Adobe 技术支持联...---------------------------
配置错误
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MIT官方已升级至2.70版本，中文网待测试并升级相关特性 - App Inventor 2 ...
...g relative path files (@arjuninv)Add TextChange event, MoveCursor methods, and HintColor property to TextBox and related components (@gordonlu310)Show translated help in property help widgetsAdd CircularProgress and LinearProgress components from Kodular (@barreeeiroo)Add Theme and Toolkit propertie...
Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABL...
运行故障：edu.mit.appinventor aicompanion3: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. Strongly consider using FLAG IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being ...
Call to ‘set-and-coerce-property!’ has too few arguments (3; must be...
编译apk，报错：Call to ‘set-and-coerce-property!’ has too few arguments (3; must be 4)
原因是因为代码块有问题/报错，有空的地方没有填值，比如这种：
参考：https://community.appinventor.mi ... 3-must-be-4/20690/4
又学习到了新bug的解决方法...
Service and Characteristic are not published by the connected device -...
Service and Characteristic are not published by the connected device，报错如下：
问题原因：硬件/蓝牙芯片问题导致的，比如A硬件测试好的，换了B硬件没有修改uuid，就出现这个报错。
由于B硬件没有发布这些特征，就会报这个错误。
How to implement an abstract class in ruby?
...you just call abstract_methods with the list of methods that are abstract, and when they get called by an instance of the abstract class, a NotImplementedError exception will be raised.
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log4j configuration via JVM argument(s)?
...o I have to set/pass as arguments to the JVM to get log4j to run properly? And by properly I mean not complain and print to the console. Can I see a typical example?
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