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What's “P=NP?”, and why is it such a famous question? [closed]
...uestion, but in regards to the proof. Not only would a proof be worth some extra credit, but it would solve one of the Millennium Problems. An interesting poll was recently conducted and the published results (PDF) are definitely worth reading in regards to the subject of a proof.
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Ioc/DI - Why do I have to reference all layers/assemblies in application's entry point?
...t no longer happens automatically. Personally, I rarely find it worth that extra effort.
A more elaborate version of this answer can be found in this excerpt from my book Dependency Injection, Principles, Practices, Patterns.
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Performance optimization strategies of last resort [closed]
...x4 matrices and 4-vectors of floats. Changing the code to carry around the extra empty slot and converting the calculation to floating point from fixed point allowed for a slightly less-accurate but much faster result.
– RBerteig
May 30 '09 at 2:19
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What are copy elision and return value optimization?
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Copy elision is an optimization implemented by most compilers to prevent extra (potentially expensive) copies in certain situations. It makes returning by value or pass-by-value feasible in practice (restrictions apply).
It's the only form of optimization that elides (ha!) the as-if rule - copy el...
C# 5 async CTP: why is internal “state” set to 0 in generated code before EndAwait call?
...rrect, as -1 normally means "finished". I could argue that we're giving an extra meaning to state 0 at the moment, but ultimately it doesn't really matter. The point of this question was finding out why the state is being set at all.
The value is relevant if the await ends in an exception which is ...
Why do pthreads’ condition variable functions require a mutex?
...ad could come out when there was no work to be done. So you had to have an extra variable indicating that work should be done (this was inherently mutex-protected with the condvar/mutex pair here - other threads needed to lock the mutex before changing it however).
It was technically possible for a...
What are the big differences between TFVC (TFS Version Control) and Git for source control when usin
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@MatthewWhited Also, I agree on the extra application lifecycle tooling, but I'm scoping my answer to only source code version controlling solutions.
– James Wierzba
Jul 23 '18 at 18:18
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Try-catch speeding up my code?
... I’ve always wondered why the C# compiler generates so many extraneous locals. For example, new array initialisation expressions always generate a local, but is never necessary to generate a local. If it allows the JITter to produce measurably more performant code, perhaps the C# comp...
How to count the number of set bits in a 32-bit integer?
...bit elements in a 64-bit integer with a 0x0101010101010101 multiplier, and extract the high byte with >>56. So it doesn't take any extra steps, just wider constants. This is what GCC uses for __builtin_popcountll on x86 systems when the hardware popcnt instruction isn't enabled. If you can ...
How does data binding work in AngularJS?
...f control could have ~150 items and still be highly usable. If it has some extra feature (for example a specific class on the currently selected option) you start to get 3-5 bindings per option. Put three of these widgets on a page (e.g. one to select a country, the other to select a city in the sai...