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map vs. hash_map in C++
I have a question with hash_map and map in C++. I understand that map is in STL, but hash_map is not a standard. What's the difference between the two?
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C++ auto keyword. Why is it magic?
From all the material I used to learn C++, auto has always been a weird storage duration specifier that didn't serve any purpose. But just recently, I encountered code that used it as a type name in and of itself. Out of curiosity I tried it, and it assumes the type of whatever I happen to assig...
Case-insensitive string comparison in C++ [closed]
What is the best way of doing case-insensitive string comparison in C++ without transforming a string to all uppercase or all lowercase?
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Convert a String In C++ To Upper Case
...'m personally ill-disposed towards boost as an answer to "how do I do x in C++?" because boost is not a lightweight solution at all. It seems that you either buy into boost as a framework (or ACE or Qt or Recusion ToolKit++ or ...) or you don't. I'd prefer to see language solutions.
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Define static method in source-file with declaration in header-file in C++
I am having a little trouble working with static methods in C++
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Are members of a C++ struct initialized to 0 by default?
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C++11 now allows you to initialize them in the definition of the struct or class, like so: struct Snapshot { double x{0}; //with braces int y = 0 ; //or just old school style 'by assignem...
How to implement the factory method pattern in C++ correctly
There's this one thing in C++ which has been making me feel uncomfortable for quite a long time, because I honestly don't know how to do it, even though it sounds simple:
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C++ Erase vector element by value rather than by position? [duplicate]
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Not the answer you're looking for? Browse other questions tagged c++ vector stl erase erase-remove-idiom or ask your own question.
Why is conversion from string constant to 'char*' valid in C but invalid in C++
The C++11 Standard (ISO/IEC 14882:2011) says in § C.1.1 :
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What are the differences between a pointer variable and a reference variable in C++?
...annot (not without some indirection):
const int &x = int(12); //legal C++
int *y = &int(12); //illegal to dereference a temporary.
This makes const& safer for use in argument lists and so forth.
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