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APP 添加新的房间开关 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...制作APP 时，如何制作这一部分功能?我的理解，就是新增一个设备连接成功即可，然后把它归类到某个房间。房间可以添加多个，维护设备和房间的一个映射关系。意思就是 在使用手机APP过程中如果想控制客厅灯 ，就可以在手...
界面很多按钮时，如何获取当前被点击的按钮的文本？ - App Inventor 2 中文...
Q：请教一个问题。假如我设计一个计算器，把0-9文本标到按键上，我用什么方法获取到每一个按下的值？辟如888，我要把这个值显示在标签里。
A：使用“任意按钮”的文本方法，用于获取当前被点击的按钮的文本，参数是当...
今天又是一个值得开心的日子，加油 - 微思想区 - 清泛IT社区，为创新赋能！
今天又是一个值得开心的日子，加油
Apache Prefork vs Worker MPM
...ne and only one MPM must be loaded into the server at any time. MPMs are chosen during configuration and compiled into the server by using the argument --with-mpm=NAME with the configure script where NAME is the name of the desired MPM.
Apache will use a default MPM for each operating system unless...
How is mime type of an uploaded file determined by browser?
...st to catch types that we can
// deduce but that we also want to allow the OS to override.
The hard-coded lists come a bit earlier in the file: https://cs.chromium.org/chromium/src/net/base/mime_util.cc?l=170 (kPrimaryMappings and kSecondaryMappings).
An example: when uploading a CSV file from a Wi...
Assign output of os.system to a variable and prevent it from being displayed on the screen [duplicat
I want to assign the output of a command I run using os.system to a variable and prevent it from being output to the screen. But, in the below code ,the output is sent to the screen and the value printed for var is 0, which I guess signifies whether the command ran successfully or not. Is there ...
What does Python's eval() do?
...ing and then have python run it as code. So for example: eval("__import__('os').remove('file')").
– BYS2
Feb 21 '12 at 19:24
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How can I check the extension of a file?
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os.path provides many functions for manipulating paths/filenames. (docs)
os.path.splitext takes a path and splits the file extension from the end of it.
import os
filepaths = ["/folder/soundfile.mp3", "folder1/folder/sound...
Installing PG gem on OS X - failure to build native extension
...any others have had problems installing the pg gem. None of the solutions posed for others have worked for me.
15 Answers
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tcp端口状态ESTABLISHED、TIME_WAIT、CLOSE_WAIT 、SYN_RECV等详解 - C/C++...
...TIME_WAIT状态下的socket不能被回收使用。 具体现象是对于一个处理大量短连接的服务器，如果是由服务器主动关闭客户端的连接，将导致服务器端存在大量的处于TIME_WAIT状态的socket，甚至比处于Established状态下的socket多的多，严重...