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App Inventor 2 代码调试方式:App调试、问题排查方法 - App Inventor 2 中...

App Inventor 2 调试方式所有调试App前提是安装好AI伴侣,并与AI伴侣连接后进行,我们在设计界面每次改动,都会实时反映在AI伴侣中。AI伴侣可以运行在手机上,也可以是安卓模拟器。AI伴侣具体安装及连接步骤请参考《Ap...
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App Inventor 2 计时器(Clock)详细用法示例 · App Inventor 2 中文网

... 计时器在界面设计中哪里? 计时器怎么启动? 怎么确定计时器执行没? 怎么获取手机当前时间? 格式化时间,上面函数返回当前时刻格式化成文本: 24小时格式怎么写? 如何...
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App Inventor 2 MQTT拓展入门(保姆级教程) · App Inventor 2 中文网

...试,效果如下: 云平台服务器端可以查看订阅设备数量,以及消息发送历史: .aia 源码下载 « 返回首页 《App Inventor 2 UrsPahoMqttClient 拓展中文文档(完整版)》 准备工作 APPINVENTOR测试平台:AppInventor2...
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软件里面自带图表组件绘制出来曲线 带有数据点,请问如何取消该点 - Ap...

...是上面这种类型,想请教一下如何把这个点取消掉 原生图表数据点无法去掉。要想使用高级/定制图表,考虑使用拓展:https://bbs.tsingfun.com/thread-1688-1-1.html,或者使用js版本echarts.js,使用Web浏览器与js交互实现高度定制图...
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AppInventor2可以接收VR眼镜头传吗? - App应用开发 - 清泛IT社区,为创新赋能!

Q:想问一下你这个软件可以接收VR眼镜头传吗? A:支持,不过是间接调用vr眼镜配套app,使用 activity 启动器组件,核心功能还得是 vr 提供商 app,核心代码块参考如下: 应用程序(对于 Expeditions 或 Virtuality)...
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“AppInventor学院”App国内各大市场上架之旅 - App应用开发 - 清泛IT社区...

...政策》在线网页url,告知用户你如何访问及访问隐私权限用途,可以参考:https://www.fun123.cn/static/privacy_policy.html app启动时必须弹窗,展示上面隐私政策网页,用户点同意才能继续,否则直接退出app。不仅如此,还需要在Ap...
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How do I perform the SQL Join equivalent in MongoDB?

... is small. It is going to bring each book content to your client and then fetch each category, lending and authors one by one. The moment your books are in thousands, this would go really really slow. A better technique probably would be to use aggregation pipeline and output the merged data into a...
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How to use filter, map, and reduce in Python 3

...f noiters(*funcs): if not funcs: funcs = [map, filter, zip] # etc from functools import reduce globals()[reduce.__name__] = reduce for func in funcs: globals()[func.__name__] = lambda *ar, func = func, **kwar: list(func(*ar, **kwar)) try: yield finall...
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JavaScript global event mechanism

...r app also manipulating window.onerror in an unknown way (jquery, angular, etc.). probably many cases I haven't run into after exploring this now (iframes, stack overflow, etc.). Here is the start of a script that catches many of these errors, so that you may add more robust debugging to your app ...
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Why are dashes preferred for CSS selectors / HTML attributes?

...ff you do with JavaScript these days, you'd want to use CSS Selectors for fetching elements from the DOM anyway, which makes the whole dot notation rather useless. Which one would you prefer? var firstName = $('#first-name'); var firstName = document.querySelector('#first-name'); var firstName = do...