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AppInventor 如何拼接 json 文本 - App应用开发 - 清泛IT社区，为创新赋能！
需要拼接 json 文本通过 mqtt 发送，原理是利用字典的特性，它天生就是 json 的一种表现，打印出来就是 json 格式文本，拼接方式如下：
使用 创建字典 代码块，默认只有 2 个插槽，表面上看起来只能放 2 组数据，但是它是...
How to get first 5 characters from string [duplicate]
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substr("Häagen-Dazs", 0, 5) == "Häag" - what am i doing wrong?
– user187291
Sep 24 '10 at 13:32
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通信连接组件 · App Inventor 2 中文网
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MqttClient 拓展
ClientSocket 拓展
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已知的bug：
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通信连接...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...s); })();
使用App Inventor扩展实现多点触控：Rotation Detector
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Using App Inventor extensions to implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@gmail.com
DRAFT (...
How to Display blob (.pdf) in an AngularJS app
...ered Jun 11 '15 at 14:03
Jan TchärmänJan Tchärmän
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Do I need dependency injection in NodeJS, or how to deal with …?
...ation has changed considerably since '09?
– Juho Vepsäläinen
Dec 12 '13 at 15:13
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Do you mean...
How do you manage databases in development, test, and production?
...red Aug 17 '08 at 9:38
Juha SyrjäläJuha Syrjälä
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Printing the value of a variable in SQL Developer
...d Oct 25 '11 at 12:38
Klas LindbäckKlas Lindbäck
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git working on two branches simultaneously
...red Jan 12 '10 at 18:50
Stefan NäweStefan Näwe
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What does the “expand” option do in grunt-contrib-copy? The examples all use it but the docs say not
...r is not correct. It is at best simplified.
– David Pärsson
Mar 6 '15 at 14:03
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-1. This is mis...