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MQTT 打包后，运行退到后台在返回，mqtt连接掉线问题 - App应用开发 - 清泛...
...成连接失败时，需要进行一次重新连接：将连接逻辑定义一个过程，初始化及断开时调一下这个过程，进行一次连接，就可以了。https://www.fun123.cn/reference/iot/MQTT.html
文档正在翻译进度过半。
试了，切走页面，又切回来...
【鸿蒙内核】记录一次鸿蒙内核问题跟踪历程 - C/C++ - 清泛IT社区，为创新赋能！
...、纯血鸿蒙则是参考Google的初期发展路径，自己也分支了一个Linux内核，然后自己搞中间层，自己搞一套开发语言。
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在纯血鸿蒙上出现了一个网络问题，使用 select 模型，Win/Linux都运行的很好，但是鸿蒙总是失败。
根据...
MQTT接入EasyIoT平台 - 创客硬件开发 - 清泛IT社区，为创新赋能！
在这篇文章基础上进行的另一个平台的测试，先学习这个：https://www.fun123.cn/reference/iot/MQTTGuide.html。
网址：https://iot.dfrobot.com.cn/
自行注册并登录。
新建一个订阅主题。
代码差别主要在：地址、端口不同，且使用用户...
运动软件设计问题 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
本帖最后由 wwwwwwwwwwww 于 2026-07-03 10:55 编辑
我要做一个运动软件，里面有一个轨迹图功能，我应该怎么做出来？需要用什么组件？而且我需要怎么处理运动距离过远的时候缩放和自动保存？
地图相关组件，画线组件，地图本...
Redis: possible to expire an element in an array or sorted set?
...top sounds like the perfect solution, and leaves Redis to do what it does, excellently
– Kieren Johnstone
Apr 4 '15 at 11:16
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What should every programmer know about security? [closed]
...aware of buffer overflows and how to protect against them
There are some excellent books and articles online about making your applications secure:
Writing Secure Code 2nd Edition - I think every programmer should read this
Building Secure Software: How to Avoid Security Problems the Right Way
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In C/C++ what's the simplest way to reverse the order of bits in a byte?
... Yes, it is simple. It's a kind of divide and conquer algorithm. Excellent!
– kiewic
May 11 '10 at 4:25
Is i...
Annotating text on individual facet in ggplot2
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Expanding slightly on joran's excellent answer, to clarify how the label dataframe works.
You can think of "mpg" and "wt" as the x and y coordinates, respectively (I find it easier to keep track of the original variable names than renaming them, as in...
JavaScript data grid for millions of rows [closed]
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I am trying to use slickgrid to show excel headers, and I am seeing that when having too many columns slickgrid only optimizes the scrolling of rows and not of columns. I have also noticed that when having more than 120 columns or so - slickgrid puts the new r...
jQuery Validate - require at least one field in a group to be filled
I'm using the excellent jQuery Validate Plugin to validate some forms. On one form, I need to ensure that the user fills in at least one of a group of fields. I think I've got a pretty good solution, and wanted to share it. Please suggest any improvements you can think of.
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