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AppInventor2二进制数据以什么样形式传递?字节列表、字节数组是什么...

1、byte[] 类型(字节数组)字段:App Inventor 无法直接处理字节数组,但它们可以作为扩展之间通用 Object 类型变量进行交换。 MQTT拓展中字节数组处理方式就是这种,直接转换成byte[]: @SimpleFunction(description = "Publishe...
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Automatically capture output of last command into a variable using Bash?

... 72 +25 This is ...
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Java's final vs. C++'s const

... Benjamin 29k3636 gold badges152152 silver badges267267 bronze badges answered Feb 11 '11 at 16:11 RalphRalph 109k4747 gold badge...
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Inherit from a generic base class, apply a constraint, and implement an interface in C#

...if you are a professional C# developer, you should already have C# spec in PDF format on your machine. Also, I don't mean to criticize you either. I was not used to reading spec earlier but I have started reading it thanks to Jon, Eric and Pavel who always quotes C# spec for any question. I found th...
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mqtt 接收信息为json格式 怎么将json 信息解析出来显示在指定文本上 ...

需要解析JSON 格式 接收信息,通过JSON解析后 把WD 参数24 解读出来 显示到文本上 代码如下: 注意:此代码块是右键导出png,具有还原代码块功能,无需手动一个个处理。 具体还原方法请参考:https:...
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界面很多按钮时,如何获取当前被点击按钮文本? - App Inventor 2 中文...

...,把0-9文本标到按键上,我用什么方法获取到每一个按下值?辟如888,我要把这个值显示在标签里。 A:使用“任意按钮”文本方法,用于获取当前被点击按钮文本,参数是当前按钮组件对象: 演示代码块如下...
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在APP InventorBLE组件使用RequestMTU方法之后,发送字符数依旧限制在2...

目前APP是能连接上蓝牙,也能传输数据,但是发送和接受数据都是20字节分包。使用BLE调试宝,在里面修改MTU,返回值是512,并且是修改成功,但是在编程中使用RequestMTU方式设置512,,并且读取返回值也是512,然后调用...
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Is the sizeof(some pointer) always equal to four?

... gcc 4.72 print all 8 ... Is this undefined in c++ standard ? – Gob00st Nov 3 '12 at 18:54 2 ...
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AI2伴侣权限问题 - App应用开发 - 清泛IT社区,为创新赋能!

...帖最后由 anticipation 于 2024-07-29 19:57 编辑 关于这个遇到问题,请跳到以下链接去查看 https://bbs.tsingfun.com/thread-1864-1-1.html 然后,经过我这几天神仙操作,终于找到解决问题: 首先,先接触手机对AI2伴侣软件管控(我...
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Check if a method exists

... 72 There is also the static message instancesRespondToSelector:(SEL)selector You would call it lik...