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飞机大战游戏 - .aia 案例源码 - 清泛IT社区，为创新赋能！
屏幕数量：3个，代码块2000左右，游戏完成度很高，可玩性非常好，有很好的学习参考价值。
apk可以安装试玩。
Appinventor 音效调用播放后没有声音？ - App应用开发 - 清泛IT社区，为创新赋能！
...观察代码，才发现调用播放后，又调用了停止方法，导致的声音不播放问题，去掉即可。
当然如果因为音频文件损坏等原因，也可能无法正常播放，这时可以先去资源区，点击隐私文件，菜单中选择预览，可以预览播放，事...
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。
翻牌游戏App - .aia 案例源码 - 清泛IT社区，为创新赋能！
屏幕数量：3个，代码块200左右，游戏完成度很高，可玩性非常好，有很好的学习参考价值。
apk可以安装试玩。
有没有滑动选择框拓展？ - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
Q: 有类似这种滑动选择的相关拓展吗？
WheelView：滚轮选择框扩展 - App Inventor 2 拓展 - 清泛IT社区，为创新赋能！
...ny strings.original code from WheelView: 效果类似android4.0以上原生的DatePicker 18Thanks @wildcontrol to sponsor this extensionDemo picture:this demo used 3 extensionsAll the blocks
来源：https://wangsk789.github.io/wheelview/
更多滚轮拓展见：https://www.fun123.cn/reference/ .....
Are HLists nothing more than a convoluted way of writing tuples?
I am really interested in finding out where the differences are, and more generally, to identify canonical use cases where HLists cannot be used (or rather, don't yield any benefits over regular lists).
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What to do with branch after merge
...
Fix/fix-<somedescription> or
Ftr/ftr-<somedescription> or
etc.
Using Tower as my git front end, it neatly organizes all the Ftr/, Fix/, Test/ etc. into folders.
Once I am done with a branch, I rename them to Done/...-<description>.
That way they are still there (which ca...
Fastest method to replace all instances of a character in a string [duplicate]
What is the fastest way to replace all instances of a string/character in a string in JavaScript? A while , a for -loop, a regular expression?
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Cannot delete or update a parent row: a foreign key constraint fails
... (`advertiser_id`)
REFERENCES `jobs` (`advertiser_id`);
...is actually the opposite to what it should be. As it is, it means that you'd have to have a record in the jobs table before the advertisers. So you need to use:
ALTER TABLE `jobs`
ADD CONSTRAINT `advertisers_ibfk_1` FOREIGN KEY...