大约有 15,685 项符合查询结果（耗时：0.0164秒） [XML]
mongoDB/mongoose: unique if not null
...cumentation with respect to Unique Indexes and Missing Keys here at http://www.mongodb.org/display/DOCS/Indexes#Indexes-UniqueIndexes.
// NOTE: Code to executed in mongo console.
db.things.ensureIndex({firstname: 1}, {unique: true});
db.things.save({lastname: "Smith"});
// Next operation ...
Can't update Macports (with Mac OS X Mavericks)
...ate, and resolved it by doing a fresh installation of MacPorts from http://www.macports.org/install.php. Now I can run the selfupdate command without error and install other ports.
The error I were seeing was below, it seems the same problem as Yo Sophia has pointed out:
$ sudo port selfupdate
Pas...
What does PHP keyword 'var' do?
...
I quote from http://www.php.net/manual/en/language.oop5.visibility.php
Note: The PHP 4 method of declaring a variable with the var keyword is still supported for compatibility reasons (as a synonym for the public keyword). In PHP 5 before 5...
$.ajax - dataType
...=====
Sample request:
POST /search HTTP/1.1
Content-Type: application/x-www-form-urlencoded
<<other header>>
name=sam&age=35
==============================
The last line above "name=sam&age=35" is the message body and contentType specifies it as application/x-www-form-url...
Disable hover effects on mobile browsers
...freek/24Z5M/. Test the above solution for yourself in this sandbox.
http://www.macfreek.nl/memory/Touch_and_mouse_with_hover_effects_in_a_web_browser. This same answer, with a bit more background.
https://www.html5rocks.com/en/mobile/touchandmouse/. Great background article on html5rocks.com about t...
Best approach for GPGPU/CUDA/OpenCL in Java?
...o technically you can't write kernel code from Java. There is JCUDA http://www.jcuda.de/jcuda/JCuda.html, it provides you with cuda's apis for general memory/device menagement and some Java methods that are implemented in CUDA and JNI wrapped (FFT, some linear algebra methods.. etc etc..).
On the ...
Using ls to list directories and their total sizes
...xr-xr-x 2 root root 4.0K Feb 12 16:43 cgi-bin
drwxrws--- 6 root www 20M Feb 18 11:07 document_root
drwxr-xr-x 3 root root 1.3M Feb 18 00:18 icons
drwxrwsr-x 2 localusr www 8.0K Dec 27 01:23 passwd
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How can I convert string to datetime with format specification in JavaScript?
...
I think this can help you: http://www.mattkruse.com/javascript/date/
There's a getDateFromFormat() function that you can tweak a little to solve your problem.
Update: there's an updated version of the samples available at javascripttoolbox.com
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Tool to track #include dependencies [closed]
... #include dependency graph as a dot file for input into graphviz.
http://www.flourish.org/cinclude2dot/
If you don't want to go the way of that sort of manual tool, then the hands-down by far winner is in my opinion a tool known as "IncludeManager" from ProFactor.
http://www.profactor.co.uk/inc...
How do I get a list of all subdomains of a domain? [closed]
...ering.com, my google search looks like this: site:realtimerendering.com -"www.realtimerendering.com" -"kesen.realtimerendering.com" -"erich.realtimerendering.com" -"advances.realtimerendering.com"
– ahcox
Oct 15 '15 at 18:02
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