大约有 22,590 项符合查询结果（耗时：0.0387秒） [XML]
Difference between single and double square brackets in Bash
...IX vs Bash extension:
[ is POSIX
[[ is a Bash extension¹ documented at: https://www.gnu.org/software/bash/manual/bash.html#Conditional-Constructs
regular command vs magic
[ is just a regular command with a weird name.
] is just an argument of [ that prevents further arguments from being used....
How do I get the name of captured groups in a C# Regex?
...0}, Value: {1}", regex.GroupNameFromNumber(group.Index), group.Value);
}
http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex.groupnamefromnumber.aspx
share
|
improve this ...
Is it possible to have empty RequestParam values use the defaultValue?
... include it if you expect to receive requests where it isn't set at all:
http://example.com/test
share
|
improve this answer
|
follow
|
...
Automatic Retina images for web sites
...
<img src="low-res.jpg" srcset="high-res.jpg 2x">
Browser Support: http://caniuse.com/#search=srcset
Other Resources:
WebKit release post
W3C documentation for srcset
good explanation about why and how to use srcset
Chris Coyer's post for more good info
...
How to specify a port number in SQL Server connection string?
... specify an instance name when specifying the port.
Lots more examples at http://www.connectionstrings.com/. It's saved me a few times.
share
|
improve this answer
|
follow
...
How to create a self-signed certificate with OpenSSL
I'm adding HTTPS support to an embedded Linux device. I have tried to generate a self-signed certificate with these steps:
...
What's the state of the art in email validation for Rails?
...
/\A[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]+\z/
That was adapted from http://www.regular-expressions.info/email.html -- which you should read if you really want to know all the tradeoffs. If you want a more correct and much more complicated fully RFC822-compliant regex, that's on that page too...
Is it safe to push_back an element from the same vector?
...
It looks like http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-closed.html#526 addressed this problem (or something very similar to it) as a potential defect in the standard:
1) Parameters taken by const reference can be changed during ...
How to make a variadic macro (variable number of arguments)
...lained for g++ here, though it is part of C99 so should work for everyone
http://www.delorie.com/gnu/docs/gcc/gcc_44.html
quick example:
#define debug(format, args...) fprintf (stderr, format, args)
share
|
...
SVN encrypted password store
...ide that warning or use an encrypted storage to cache the passwords.
See: http://blogs.collab.net/subversion/2009/07/subversion-16-security-improvements/
share
|
improve this answer
|
...