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What are the differences between NP, NP-Complete and NP-Hard?
...uced to this one. As another example, any NP-complete problem is NP-hard.
My favorite NP-complete problem is the Minesweeper problem.
P = NP
This one is the most famous problem in computer science, and one of the most important outstanding questions in the mathematical sciences. In fact, the Cl...
Lock-free multi-threading is for real threading experts
...n computer hardware was slow and expensive. Dekker's algorithm was always my favorite, modern hardware has put it out to pasture. It doesn't work anymore.
Two developments have ended this: the growing disparity between the speed of RAM and the CPU. And the ability of chip manufacturers to put mo...
What's the difference between “groups” and “captures” in .NET regular expressions?
...functionality in regex land. Lazy / greedy? What does that have to do with my comments? It enables having a variable amount of capture buffers. It can sweep the entire string in a single match. If .*?(dog) finds the first dog then (?:.*?(dog))+ will find all dog in the entire string in a single matc...
How does Google Instant work?
...x3e.org began as the merging of two ideas that have been kicking around in my head for years. First, I wanted a dorky programming-related domain \\x3cb\\x3e...\\x3c/b\\x3e\\x3cbr\\x3e\\x3cspan class\\x3df\\x3e\\x3ccite\\x3e\\x3cb\\x3estackoverflow\\x3c/b\\x3e.org/\\x3c/cite\\x3e - \\x3cspan class\\x...
Algorithm to compare two images
...ptured from adjacent webcams using the technique presented in this paper. My covariance matrix was composed of Sobel, canny and SUSAN aspect/edge detection outputs, as well as the original greyscale pixels.
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Why do I have to access template base class members through the this pointer?
...s = 0; is ambiguous). Again, I don't know quite how the rules were agreed. My guess is that the number of pages of text that would be required, mitigated against creating a lot of specific rules for which contexts take a type and which a non-type.
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RAII and smart pointers in C++
...ut of scope, the resource will be freed. Some real world example of one of my projects:
Code:
shared_ptr<plot_src> p(new plot_src(&fx));
plot1->add(p)->setColor("#00FF00");
plot2->add(p)->setColor("#FF0000");
// if p now goes out of scope, the src won't be freed, as both plot...
How many GCC optimization levels are there?
...
I have explored the source code in my answer and agree with you. More pedantically, GCC seems to rely on atoi undefined behavior, followed by a 255 internal limit.
– Ciro Santilli 郝海东冠状病六四事件法轮功
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How to detect if multiple keys are pressed at once using JavaScript?
...laying with declarative style programming for a while, and this way is now my personal favorite: fiddle, pastebin
Generally, it'll work with the cases you would realistically want (ctrl, alt, shift), but if you need to hit, say, a+w at the same time, it wouldn't be too difficult to "combine" the app...
Why do we need RESTful Web Services?
...
REST was kicked off, to my knowledge, by Roy Fielding's dissertation Architectural Styles and the Design of Network-based Software Architectures, which is worth a read if you haven't looked at it.
At the top of the dissertation is a quote:
Almost ...