stl
Multiple predicates specified during runtime
There are operator classes in STL like less, equal_to, greater_equal etc.How to easily comb开发者_如何学运维ine them to use with for example remove_if function?[详细]
2023-04-11 04:48 分类:问答Is the order of iterating through std::map known (and guaranteed by the standard)?
What I mean is - we know that the std::map\'s elements are sorted according to the keys. So, let\'s say the keys are integers. If I iterate from std::map::begin() to std::map::end() using a for, does[详细]
2023-04-11 04:24 分类:问答easy way to maintain a min heap with stl?
for user defined struct, as I understand, it\'s easy. Just overload the operator <. However, for int/float etc.., do I really need to overload operator < for int?[详细]
2023-04-11 02:44 分类:问答Is there an STL Allocator that will not implicitly free memory?
Memory usage in my STL containers is projected to be volatile - that is to say it will frequently shrink and grow.I\'m thinking to account for this by specifying an allocator to the STL container type[详细]
2023-04-11 00:33 分类:问答Is there a reason to use `remove` outside of the erase-remove idiom?
As far as the algorithm is concerned, removing a set of element from a contiguous array can be done effectively in two parts.[详细]
2023-04-10 23:08 分类:问答Use STL to populate a vector<T> from map<T,Z>'s keys
map<T,Z> m= .开发者_开发百科..; vector<T> v; v.reserve(m.size); for(map<T,Z>::iterator it=m.begin();it!=m.end();++it)[详细]
2023-04-10 18:43 分类:问答Creating a STL map key-iterator
Often, you have a map like map<string,X> where the key is the name of the mapped value, and you need an API which lets consumers see all the names... to populate a GUI list-box for example.[详细]
2023-04-10 18:38 分类:问答std::hash_set vs std::unordered_set, are they the same thing?
I know hash_set is non-standard and unordered_set is standard. However, I am wondering, performance wise, what is the difference between the 开发者_高级运维two? Why do they exist separately?The comple[详细]
2023-04-10 15:30 分类:问答Why is my output file empty in this simple program using std::fstream?
I am trying to understand how to read information form an input file and write that data into an output file. I understand how to read from a file and dispaly its contents, but I DONT understand how t[详细]
2023-04-10 09:03 分类:问答Learning C++ & STL by doing game programming project? [closed]
Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow.[详细]
2023-04-10 08:59 分类:问答