大约有 10,000 项符合查询结果(耗时:0.0247秒) [XML]

https://bbs.tsingfun.com/thread-2562-1-1.html 

AppInventor2画布拖动事件中 起点、前点、当前点,都是啥意思? - App应用...

...点、当前点,都是啥意思? A: 起点:第一次触摸屏幕位置。 前点:最后一次拖动前位置。 当前点:当前拖动后最新位置。 详见中文文档:https://www.fun123.cn/reference/ ... html#Canvas.Dragged
https://bbs.tsingfun.com/thread-2631-1-1.html 

AppInventor2 解析json数据技巧 - App应用开发 - 清泛IT社区,为创新赋能!

...bc19a9924473b86ff49d426cf06f" }复制代码要求:解析出每一项 value 数值。 技巧: [] 是列表,{} 是字典,用不同解析方法,查找元素方法也不一样。 拿出指定对象值 遍历所有对象列表:
https://bbs.tsingfun.com/thread-2635-1-1.html 

AppInventor2 文本和数字如何转换? - App应用开发 - 清泛IT社区,为创新赋能!

...ppInventor2 文本和数字如何转换? A:先来一个文本转数字情况: 定义一个变量赋初值 数字0,然后将文本设置给它,事实证明这时它自动变成了文本类型,而不再是数字。因此此方案行不通。 最彻底方案: [hide] 直接使...
https://bbs.tsingfun.com/thread-2686-1-1.html 

ble蓝牙怎么接收中文 - App Inventor 2 拓展 - 清泛IT社区,为创新赋能!

如题,用ble蓝牙扩展[color=rgba(0, 0, 0, 0.85)]StringsReceived,接收单片机发过来中文和字符串,字符串能正常显示在标签组件上,但是中文显示为乱码,请问我要怎么处理中文?? 英文能正常显示,中文乱码,那肯定就是字符集...
https://bbs.tsingfun.com/thread-2704-1-1.html 

507问题求助 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

各位大佬们帮我看看为什么我app会出现蓝牙无法连接问题,我是根据其他人逻辑设计做下来,但是我手机连接不上蓝牙模块,会显示507问题
https://bbs.tsingfun.com/thread-2710-1-1.html 

AppInventor2 如何实现屏幕截屏并将图片拷贝/分享? - App Inventor 2 中文...

...用法很简单,截屏完成后会触发事件,参数给出截屏图片路径,存储在 app 私有目录,通过手机文件管理器就可以查看。 app 私有目录路径参考: 将截图图片分享出去:社交应用,信息分享器 组件 类似文件分享...
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Why are mutable structs “evil”?

...roperty that is supposed to returns the six float components of a graphics transform. If such a method returns an exposed-field struct with six components, it's obvious that modifying the fields of the struct won't modify the graphics object from which it was received. If such a method returns a m...
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What is the Haskell response to Node.js?

...tion passing style) and I think it should be the compiler's job to do that transformation. Events: No thread manipulation, the programmer only provides callbacks (as in Snap framework) So with this in mind, you can write using a asynchronous style if you so wish, but by doing so you'd miss out...
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PUT vs. POST in REST

...event sourcing and CQRS. When the work is done asynchronously, POSTing the transformation and waiting for it to be applied seems appropriate. share | improve this answer | fo...
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What is the purpose of Rank2Types?

... likely doesn't encode existential types via higher ranked types (i.e. the transformation you suggest - ∃x.P(x) ~ ∀r.(∀x.P(x) → r) → r). – Vitus Aug 21 '12 at 1:22 ...