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Rails: What's a good way to validate links (URLs)?
...ke a simple regular expression, it will probably reject the following host
http://invalid##host.com
but it will allow
http://invalid-host.foo
that is a valid host, but not a valid domain if you consider the existing TLDs. Indeed, the solution would work if you want to validate the hostname, not th...
How do you use “git --bare init” repository?
...l non-bare repository (e.g. with git add <file> and a subsequent git commit.)
You almost always update a bare repository by pushing to it (using git push) from another repository.
Note that in this case you'll need to first allow people to push to your repository. When inside test_repo.git, ...
How to compare DateTime in C#?
...
MSDN: DateTime.Compare
DateTime date1 = new DateTime(2009, 8, 1, 0, 0, 0);
DateTime date2 = new DateTime(2009, 8, 1, 12, 0, 0);
int result = DateTime.Compare(date1, date2);
string relationship;
if (result < 0)
relationship = "is ear...
Linux C/C++进程单实例互斥代码分享 - C/C++ - 清泛网 - 专注C/C++及内核技术
Linux C/C++进程单实例互斥代码分享linux-process-singleton分享一段LinuxC C++程序只能启动一份实例的实现代码，原理是通过文件锁互斥实现，最重要的是考虑了不同用户运行同一程序互斥的场景，已经过充分的测试，可直接用于实际项...
Apache and Node.js on the Same Server
...can't I have both?
Fortunately with the ProxyPass directive in the Apache httpd.conf its not too hard to pipe all requests on a particular URL to your Node.JS application.
ProxyPass /node http://localhost:8000
Also, make sure the following lines are NOT commented out so you get the right proxy a...
Strip double quotes from a string in .NET
I'm trying to match on some inconsistently formatted HTML and need to strip out some double quotes.
12 Answers
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How do Trigonometric functions work?
....
Once you've reduced your argument, most chips use a CORDIC algorithm to compute the sines and cosines. You may hear people say that computers use Taylor series. That sounds reasonable, but it's not true. The CORDIC algorithms are much better suited to efficient hardware implementation. (Softwa...
How expensive is RTTI?
...e exceptions won't work).
[1] Known as the Itanium C++ ABI, documented at http://www.codesourcery.com/public/cxx-abi/abi.html. The names are horribly confusing: the name refers to the original development architecture, though the ABI specification works on lots of architectures including i686/x86_6...
How to print number with commas as thousands separators?
I am trying to print an integer in Python 2.6.1 with commas as thousands separators. For example, I want to show the number 1234567 as 1,234,567 . How would I go about doing this? I have seen many examples on Google, but I am looking for the simplest practical way.
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