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Datatable vs Dataset
...you can return multiple distinct sets of data into a single, and therefore more manageable, object.
Performance-wise, you're more likely to get inefficiency from unoptimized queries than from the "wrong" choice of .NET construct. At least, that's been my experience.
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Is there a way to detect if a browser window is not currently active?
...tus thanks to the W3C. The Page Visibility API (on MDN) now allows us to more accurately detect when a page is hidden to the user.
document.addEventListener("visibilitychange", onchange);
Current browser support:
Chrome 13+
Internet Explorer 10+
Firefox 10+
Opera 12.10+ [read notes]
The fol...
How to delete a row by reference in data.table?
...e quite inefficient compared to a row store database such as SQL, which is more suited for fast insert and delete of rows wherever those rows are in the table. But still, it would be a lot faster than copying a new large object without the deleted rows.
On the other hand, since column vectors would...
MPICH vs OpenMPI
...rts the Cray Gemini interconnect, but its usage is not supported by Cray. More recently, MPICH supported InfiniBand through a netmod (now deprecated), but MVAPICH2 has extensive optimizations that make it the preferred implementation in nearly all cases.
Feature Support from the Latest MPI Standar...
Detecting an undefined object property
...ld cause interesting results. But after Ecmascript 5, it's not writable anymore, so we can use the simpler version. codereadability.com/how-to-check-for-undefined-in-javascript
– Bruno Buccolo
Mar 15 '16 at 20:50
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In Docker, what's the difference between a container and an image? [duplicate]
...necessary and wasteful. They're both just states. Perhaps it could've been more concisely modeled as a DAG or even just a tree.
– Acumenus
Oct 25 '16 at 8:45
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Downloading a file from spring controllers
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Code Golf: Collatz Conjecture
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Post-increment and pre-increment within a 'for' loop produce same output [duplicate]
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Is “for(;;)” faster than “while (TRUE)”? If not, why do people use it?
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