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Python: Making a beep noise
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The cross-platform way to do this is to print('\a'). This will send the ASCII Bell character to stdout, and will hopefully generate a beep (a for 'alert'). Note that many modern terminal emulators provide the option to ignore bell char...
What do single quotes do in C++ when used on multiple characters?
... = 'celp',
} ;
There's a lot of chatter about this not being "platform independent", but when you're using an api that's made for a specific platform, who cares about portability. Checking for equality on the same platform will never fail. These enum'd values are easier to read and th...
Clear terminal in Python [duplicate]
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A simple and cross-platform solution would be to use either the cls command on Windows, or clear on Unix systems. Used with os.system, this makes a nice one-liner:
import os
os.system('cls' if os.name == 'nt' else 'clear')
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How can I generate an MD5 hash?
... byte representation in. If you just use string.getBytes() it will use the platform default. (Not all platforms use the same defaults)
import java.security.*;
..
byte[] bytesOfMessage = yourString.getBytes("UTF-8");
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] thedigest = md.diges...
System.Threading.Timer in C# it seems to be not working. It runs very fast every 3 second
...is not included in the .NET Standard Library and is not available on other platforms, such as .NET Core or the Universal Windows Platform. On these platforms, as well as for portability across all .NET platforms, you should use the System.Threading.Timer class instead.
– NotAga...
移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...移动设备的屏幕像素密度越来越高，从iphone4开始，苹果公司便推出了所谓的Retina屏，分辨率提高了一倍，变成640x960，但屏幕尺寸却没变化，这就意味着同样大小的屏幕上，像素却多了一倍，这时，一个css像素是等于两个物理像...
C++ Best way to get integer division and remainder
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You cannot trust g++ 4.6.3 here with 64 bit integers on a 32 bit intel platform. a/b is computed by a call to divdi3 and a%b is computed by a call to moddi3. I can even come up with an example that computes a/b and a-b*(a/b) with these calls. So I use c=a/b and a-b*c.
The div method gives a ca...
Facebook App: localhost no longer works as app domain
...asic tab
1.) In the center under the first box of options, click "+ Add Platform" and choose "Website" (or whatever is appropriate for your app.)
2.) In the box that comes up for the website you just added: Site URL: http://localhost:3000/
3.) In the box above that (Settings => Basic): A...
Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...内存泄露概念
众所周知，在Java中有些对象的生命周期是有限的，当它们完成了特定的逻辑后将会被垃圾回收；但是，如果在对象的生命周期本来该被垃圾回收时这个对象还被别的对象所持有引用，那就会导致内存泄漏；这样的...
How to insert newline in string literal?
...e. In my others it isn't. You really need to know that you want to use the platform-specific one. For example, it isn't a good idea if you're using a network protocol which should define line terminators itself.
– Jon Skeet
Nov 3 '10 at 9:50
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