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vector::at vs. vector::operator[]
I know that at() is slower than [] because of its boundary checking, which is also discussed in similar questions like C++ Vector at/[] operator speed or ::std::vector::at() vs operator[] << surprising results!! 5 to 10 times slower/faster! . I just don't understand what the at() met...
Explain “claims-based authentication” to a 5-year-old
...ix has a pretty good answer, but to step away from the technical aspect of it:
Claims Based Authentication is about defining who you trust to give you accurate information about identity, and only ever using that information provided. My (the) go-to example is at a bar. Imagine for a moment that ...
When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used?
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static_cast is the first cast you should attempt to use. It does things like implicit conversions between types (such as int to float, or pointer to void*), and it can also call explicit conversion functions (or implicit ones). In many cases, explicitly stating static_cast isn't ne...
Assignment in an if statement
I have a class Animal , and its subclass Dog .
I often find myself coding the following lines:
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Get the first element of an array
..., if a array "copy" is needed:
array_shift(array_slice($array, 0, 1));
With PHP 5.4+ (but might cause an index error if empty):
array_values($array)[0];
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What is uint_fast32_t and why should it be used instead of the regular int and uint32_t?
So the reason for typedef :ed primitive data types is to abstract the low-level representation and make it easier to comprehend ( uint64_t instead of long long type, which is 8 bytes).
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Heavy usage of Python at Google [closed]
Google's heavy usage of Python, is it just a matter of taste or does it give them a competitive advantage?
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Using a strategy pattern and a command pattern
Both design patterns encapsulate an algorithm and decouple implementation details from their calling classes. The only difference I can discern is that the Strategy pattern takes in parameters for execution, while the Command pattern doesn't.
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Merging: Hg/Git vs. SVN
I often read that Hg (and Git and...) are better at merging than SVN but I have never seen practical examples of where Hg/Git can merge something where SVN fails (or where SVN needs manual intervention). Could you post a few step-by-step lists of branch/modify/commit/...-operations that show where S...
Resetting a multi-stage form with jQuery
I have a form with a standard reset button coded thusly:
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