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MongoDB: Combine data from multiple collections into one..how?
...er by using the "reduce" out option in MongoDB 1.8+ map/reduce (see http://www.mongodb.org/display/DOCS/MapReduce#MapReduce-Outputoptions). You need to have some key in both collections that you can use as an _id.
For example, let's say you have a users collection and a comments collection and you...
What does the brk() system call do?
...ould not however find anything about it on the glibc docs, e.g.:
https://www.gnu.org/software/libc/manual/html_mono/libc.html#Resizing-the-Data-Segment
Things will likely just work there I suppose since mmap is likely used for malloc.
See also:
What's unsafe/legacy about brk/sbrk?
Why does ca...
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 ...
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 can I make PHP display the error instead of giving me 500 Internal Server Error [duplicate]
...on't know which line. From the console, I use this:
/var/log/php-fpm# cat www-error.log | grep mycode.php
And I have the output:
[04-Apr-2016 06:58:27] PHP Parse error: syntax error, unexpected ';' in /var/www/html/system/mycode.php on line 1458
This helps me find the line where I have the ty...
Facebook development in localhost
...lect website)
Set the Site URL field (NOT the App Domains field) to http://www.localhost:3000 (this address is for Ruby on Rails, change as needed)
In your application initializer, put in code to detect the environment
Sample Rails 3 code
if Rails.env == 'development' || Rails.env == 't...
What is the Haskell response to Node.js?
...practice.)
Haskell can't possibly win here... right? Think again, http://www.haskell.org/haskellwiki/Haskell_in_web_browser .
All this packaged in a single product.
Download ghc, fire up cabal. There's a package for every need.
...
Making your .NET language step correctly in the debugger
... experiencing this issue to try the Developer Preview of Dev11 from http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=27543 and comment with any feedback. (Must target 4.5)
Update 2:
Leppie has verified the fix to work for him on the Beta version of Dev11 available at http://...
What is JSONP, and why was it created?
... enable its JSONP capabilities. Then your request would look like:
http://www.example.net/sample.aspx?callback=mycallback
Without JSONP, this might return some basic JavaScript object, like so:
{ foo: 'bar' }
However, with JSONP, when the server receives the "callback" parameter, it wraps up t...
How to get screen width without (minus) scrollbar?
... answered Jul 5 '15 at 15:39
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