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Can two applications listen to the same port?
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The answer differs depending on what OS is being considered. In general though:
For TCP, no. You can only have one application listening on the same port at one time. Now if you had 2 network cards, you could have one application listen on the first IP and the ...
Why does the order of the loops affect performance when iterating over a 2D array?
Below are two programs that are almost identical except that I switched the i and j variables around. They both run in different amounts of time. Could someone explain why this happens?
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Reliable method to get machine's MAC address in C#
I need a way to get a machine's MAC address regardless of the OS it is running using C#. Application will need to work on XP/Vista/Win7 32 and 64 bit as well as on those OSs but with a foreign language default. Many of the C# commands and OS queries don't work across OS. Any ideas? I have been s...
Set Locale programmatically
...the changes to take effect.
EDIT 11th MAY 2018
As from @CookieMonster's post, you might have problems keeping the locale change in higher API versions. If so, add the following code to your Base Activity so that you update the context locale on every Activity creation:
@Override
protected void at...
Difference between static and shared libraries?
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Shared libraries are .so (or in Windows .dll, or in OS X .dylib) files. All the code relating to the library is in this file, and it is referenced by programs using it at run-time. A program using a shared library only makes reference to the code that it uses in the shared lib...
What is a faster alternative to Python's http.server (or SimpleHTTPServer)?
... Windows you'll need a prompt with administrator permissions, and on Linux/OSX you'll want to sudo the command:
npm install http-server -g
This will download any required dependencies and install http-server.
Use
Now, from any directory, you can type:
http-server [path] [options]
Path is optional,...
GLib compile error (ffi.h), but libffi is installed
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If you have a Debian-based Linux OS with apt-get:
sudo apt-get install libffi-dev
With a Redhat-base OS:
yum install libffi-devel
With Alpine Linux:
apk add libffi-dev
share
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App Inventor 2 列表代码块 · App Inventor 2 中文网
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用于在类似字典的结构的列表中查找信息。
此操作需要三个输入，一个 关键字、一个列表 键值对 和一个 未找到 结果，默认情况下设置为not found。
这里 键值对 必须是对的列表，即每个元素本身就是两个元素列表的...
【App Inventor 2 数据可视化】使用柱状图和饼图收集数据 - App应用开发 - ...
...Data2D1改为barGraphData2D对底部的两个饼状图组件都做同样的操作，如图所示：
第3部分：编写数据输入按钮代码7. 编写跟踪总数的按钮的代码编写happyButton代码，记录用户按下它的次数。如何使用下面显示的块(包括变量<font clas...
Using the scrollwheel in GNU screen
...scroll around in the scrollback buffer? I tried to Google about this, but most hits were on how to allow applications inside screen to use the scrollwheel.
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