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What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?
... parallel strategies. I suspect that UArray cannot be used neither, but at least it is very easy to switch from UArray to boxed Array and see if parallelization benefits outweight the boxing costs.
For color images I will wish to store triples of 16-bit integers or triples of single-precision fl...
How to detect Adblock on my website?
...ipt>
</body>
</html>
Files like ads.js are blocked by at least these adblockers on Chrome:
AdBlock
Adblock Plus
Adblock Pro
Ghostery
Update on 2019-02-15:
Added Ghostery in the list above because the extension now also blocks requests to ads.js. Very handy. Does this mean that Gh...
How to store a list in a column of a database table
...g that road is the notion of the list as a bunch of things in sequence. At least nominally, databases treat fields as single values. But if that's all you want, then you should go for it. It's a value judgement you have to make for yourself.
...
Finding all cycles in a directed graph
...rify:
Strongly Connected Components will find all subgraphs that have at least one cycle in them, not all possible cycles in the graph. e.g. if you take all strongly connected components and collapse/group/merge each one of them into one node (i.e. a node per component), you'll get a tree with no ...
Is the pImpl idiom really used in practice?
...s that a lot of libraries out there use it to stay stable in their API, at least for some versions.
But as for all things, you should never use anything everywhere without caution. Always think before using it. Evaluate what advantages it gives you, and if they are worth the price you pay.
The ad...
Cast to int vs floor
... difference in execution time. On my system, I've timed that casting is at least 3 times faster than floor.
I have code that needs the floor operation of a limited range of values, including negative numbers. And it needs to be very efficient, so we use the following function for it:
int int_floo...
Re-open *scratch* buffer in Emacs?
...
Note that there is something special about scratch, at least in GNU Emacs 21 and later: switching to a new scratch buffer will put it back into Lisp Interaction mode.
– Peter S. Housel
Oct 27 '08 at 16:16
...
Android SQLite: nullColumnHack parameter in insert/replace methods
...d SQL:
INSERT INTO foo;
That's not valid in SQLite. You have to have at least one column specified:
INSERT INTO foo (somecol) VALUES (NULL);
Hence, in the case where you pass an empty ContentValues to insert(), Android and SQLite need some column that is safe to assign NULL to. If you have sev...
How do you detect/avoid Memory leaks in your (Unmanaged) code? [closed]
...
At least std::auto_ptr and boost::shared_ptr are still susceptible to leaks.
– Jasper Bekkers
Dec 22 '08 at 23:55
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What is the Sign Off feature in Git for?
...code from Unix, I wouldn't have permission to release it under the GPL (at least without signoff from someone higher up). Or, a patch may make it between several different maintainers before winding up in the kernel tree; the signoff indicates the chain of custody. Read the certificate of origin tha...