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What MySQL data type should be used for Latitude/Longitude with 8 decimal places?
I'm working with map data, and the Latitude/Longitude extends to 8 decimal places. For example:
8 Answers
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LEGO EV3 机器人传感器面板 · App Inventor 2 中文网
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这是一个基于 MIT App Inventor 开发的 LEGO EV3 传感器监控应用。通过蓝牙连接手机与 EV3 机器人，实时显示颜色传感器、超声波传感器和触碰传感器的状态数据。
项目作者：CAVEDU Education
难度级别：中级
预计时间：1小时
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How to open a specific port such as 9090 in Google Compute Engine
...tags=<list-of-your-instances-names> --source-ranges=0.0.0.0/0 --description="<your-description-here>"
This will open the port 9090 for the instances that you name. Omitting --source-tags and --source-ranges will apply the rule to all instances. More details are in the Gcloud documentat...
What is the best way to prevent session hijacking?
...bsite for 5 minutes, they'll have to login again
– elipoultorak
Nov 16 '15 at 11:26
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ESP8285接入App Inventor 2深度调研：4种连接方案+是否需要开发拓展 - 创客...
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App Inventor端：直接用内置Web组件，Url设为 http://ESP8285的IP/led?state=1 ，调用 Web1.Get()
优点：零拓展开发，内置组件即可
缺点：只能手机主动请求，不能实时推送
方案2：TCP Socket方式(已有拓展)
原理：ESP8285运行TCP Server，Ap...
rgdal package installation
...nswered Aug 17 '14 at 21:44
François PelletierFrançois Pelletier
18311 silver badge77 bronze badges
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Should I use Vagrant or Docker for creating an isolated environment? [closed]
... what you want.
Vagrant is a virtual machine manager. It allows you to script the virtual machine configuration as well as the provisioning. However, it is still a virtual machine depending on VirtualBox (or others) with a huge overhead. It requires you to have a hard drive file that can be huge, i...
Deep copying an NSArray
...answered Mar 15 '09 at 9:18
François P.François P.
5,11644 gold badges2929 silver badges3131 bronze badges
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Node.js EACCES error when listening on most ports
...te that visitors can use by navigating to an easy to use URL like
http://ip:port/
Unfortunately, unless you sign on as root, you’ll normally have to use
a URL like http://ip:port - where port number > 1024.
A lot of people get stuck here, but the solution is easy. There a few
op...
How to swap two variables in JavaScript
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@FrançoisWahl Good point. I think most of the answers here will work and are fairly equivalent. I suppose it's a trade off between temporary variable use, amount of code, and speed.
– showdev
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