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Delete last char of string
...blem should not exist if you dont create a trailing char. Check @Øyvind Bråthen solution if you are in OP's boat.
– aloisdg moving to codidact.com
Jun 6 '18 at 9:48
add a co...
How to find whether or not a variable is empty in Bash
...in practice this tests whether $variable is empty or not. As an addition (3½ years after the fact :-) ) I would never use this myself since -z does what I probably want in a clearer way, but I wanted to add this answer since this method is frequently seen "in the wild"; perhaps written this way on ...
How do I create a copy of an object in PHP?
It appears that in PHP objects are passed by reference. Even assignment operators do not appear to be creating a copy of the Object.
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GIF Animated 扩展：可点击透明背景动画GIF播放器 · App Inventor 2 中文网
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应用场景
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目前AppInventor2用于显示图片的组件是“图像”组件，不过如果设置图片为gif的话，设计视图中图片预览会展示动图，但是通过AI伴侣测试或编译成apk真机测试，就会发现图片不...
How to escape double quotes in a title attribute
...87 | double greater-than sign »
&#189 | fraction 1/2 ½
&#191 | inverted question mark ¿
&#8220 | left double quote “
&#8212 | dash —
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How to set Sqlite3 to be case insensitive when string comparing?
...the ASCII range. For
example, the expression 'a' LIKE 'A'
is TRUE but 'æ' LIKE 'Æ' is FALSE.)."
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App Inventor 2 中的“2”是什么意思？ - App Inventor 2 中文网 - 清泛IT...
...兼容。
AI1截图：
AI2截图：
参考资料：
https://appinventor.mit.edu/explore/ai2/whats-new.html
http://www.appinventor.org/appInventor2
解决 App Inventor 2 Runtime Error运行时错误的专业指南 - App Inventor 2...
解决 App Inventor 2 Runtime Error运行时错误的专业指南AppInventorRuntimeError解决 MIT App Inventor 运行时错误的专业指南引言在使用 MIT App Inventor 开发应用程序时，运行时错误是开发者经常遇到的问题。这些错误可能源于不同的原因，如组...
【持续更新】App Inventor 2 中文拓展一览 - App Inventor 2 中文网 - 清泛...
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【UI】自定义下载器扩展：个性化下载进度展示
【UI】AppInventor2 图表扩展：仪表盘、柱状图、折线图、饼图
多媒体
【文件】FileTools 拓展：提供额外的更强大的文件相关操作
【图像】TaifunImage 拓展：图片压缩剪裁处理
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micro:bit 连接报错 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...错了。
运行故障
java.lang.ExceptionInInitializerError at edu.mit.appinventor.ble.BluetoothLEint$BLEReadOperation.subscribeBluetoothLEint.java:357) at
edu.mit.appinventor.ble.BluetoothLEintSBLEReadOperation.run(BluetoothLEint.java:325) at android.os.Handler.handleCallback(Handler.java:1013) ...