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Why can't I use switch statement on a String?
... only be compiled to a series of if() statements.
For that reason C & C++ only allow switches on integer types, since it was pointless with other types.
The designers of C# decided that the style was important, even if there was no advantage.
The designers of Java apparently thought like the...
std::string length() and size() member functions
...length and #size as synonyms for the number of items in arrays and hashes (C++ only does it for strings).
Minimalists and people who believe "there ought to be one, and ideally only one, obvious way to do it" (as the Zen of Python recites) will, I guess, mostly agree with your doubts, @Naveen, whil...
How to emulate C array initialization “int arr[] = { e1, e2, e3, … }” behaviour with std::array?
...ue (which is also legal but not required). In practice, I would expect any C++ compiler to be able to optimize that such that it's as fast as direct initialization.
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Unmangling the result of std::type_info::name
...ation about the calling function. This should be relatively easy, standard C++ has a type_info class. This contains the name of the typeid'd class/function/etc. but it's mangled. It's not very useful. I.e. typeid(std::vector<int>).name() returns St6vectorIiSaIiEE .
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Template default arguments
...Pubby The standard committee asked themselves the same, I guess. Now, with C++17, the <> is no more necessary in this case. Check out my answer for more details.
– Paolo M
Jun 21 '18 at 14:27
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Embedding DLLs in a compiled executable
... For native DLLs, you'll have a bit more work to do.
See also: How can a C++ windows dll be merged into a C# application exe?
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What is the fastest way to compute sin and cos together?
...this by using complex numbers and Euler’s Formula. Thus, something like (C++)
complex<double> res = exp(complex<double>(0, x));
// or equivalent
complex<double> res = polar<double>(1, x);
double sin_x = res.imag();
double cos_x = res.real();
should give you sine and cosi...
Node.js or Erlang
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According to the docs, Node.js can leverage C and C++ for external addons. nodejs.org/docs/v0.3.1/api/addons.html
– Evan Plaice
Jan 24 '12 at 21:13
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Pimpl idiom vs Pure virtual class interface
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When writing a C++ class, it's appropriate to think about whether it's going to be
A Value Type
Copy by value, identity is never important. It's appropriate for it to be a key in a std::map. Example, a "string" class, or a "date" class, or...
How do I output coloured text to a Linux terminal?
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Basics
I have written a C++ class which can be used to set the foreground and background color of output. This sample program serves as an example of printing This ->word<- is red. and formatting it so that the foreground color of word is red....