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c++ Programming Glossary: reallocateWhich STL container should I use for a FIFO? http://stackoverflow.com/questions/1262808/which-stl-container-should-i-use-for-a-fifo std list would be more efficient since I wouldn't need to reallocate itself or maybe I'm mistaking a std deque for a std vector ...
Inserting elements in multidimensional Vector http://stackoverflow.com/questions/13936733/inserting-elements-in-multidimensional-vector calls result in slower code since not only you need to reallocate your vector all the time but also you have to create a temporary..
Does resizing a vector invalidate iterators? http://stackoverflow.com/questions/1624803/does-resizing-a-vector-invalidate-iterators that the push_back 's can be performed without having to reallocate the array and so your iterators will stay valid. share improve..
C++ deque's iterator invalidated after push_front() http://stackoverflow.com/questions/1658956/c-deques-iterator-invalidated-after-push-front book. As far as I know c vector is a c array that can be reallocated. So I understand why after push_back all iterators and references.. does it mean If references are valid than deque couldn't reallocate move its elements. So why iterators become invalid Why can't..
C++ - Deleting a vector element that is referenced by a pointer http://stackoverflow.com/questions/2062242/c-deleting-a-vector-element-that-is-referenced-by-a-pointer all the pointers invalid since the vector might need to reallocate it's internal array which might transfer all the elements to..
Why is there no reallocation functionality in C++ allocators? http://stackoverflow.com/questions/3105001/why-is-there-no-reallocation-functionality-in-c-allocators But would there be a problem with say this function bool reallocate pointer ptr size_type num_now size_type num_requested where.. vector say could grow as follows pseudocode if allocator.reallocate buffer capacity new_capacity capacity new_capacity That's all.. probably been a bit more useful to provide a version of reallocate that either changed the size of the existing object without..
http://stackoverflow.com/questions/3482941/how-do-you-realloc-in-c I need it because as my program reads more data I need to reallocate the buffer to hold it. I don't think delete ing the old pointer..
Qt: Best way to implement “oscilloscope-like” realtime-plotting http://stackoverflow.com/questions/3848427/qt-best-way-to-implement-oscilloscope-like-realtime-plotting in terms of Qt . for code like this it's best not to reallocate ever. Set limits on beforehand of the max history and number..
Is it safe to push_back 'dynamically allocated object' to vector? http://stackoverflow.com/questions/4185350/is-it-safe-to-push-back-dynamically-allocated-object-to-vector is that push_back will not throw unless either a it has to reallocate which we know it won't because of the capacity or b a constructor..
http://stackoverflow.com/questions/4837223/c-default-destructor with an object for example wouldn't the default destructor reallocate free memory used by the object If it doesn't why are we getting..
std::map, pointer to map key value, is this possible? http://stackoverflow.com/questions/516007/stdmap-pointer-to-map-key-value-is-this-possible with other unique keys or remove some other keys won ™t it reallocate this string key value pair so the p will become invalid c stl..
How is dynamic memory managed in std::vector? http://stackoverflow.com/questions/672352/how-is-dynamic-memory-managed-in-stdvector ... if _size _capacity size is never greater than capacity reallocate T _begin1 alloc.allocate _capacity 2 0 size_type _capacity1.. and constructing object into that memory apart so it can preallocate memory but not yet call constructors. During reallocate the.. preallocate memory but not yet call constructors. During reallocate the vector has to take care about exceptions being thrown by..
Choice between vector::resize() and vector::reserve() http://stackoverflow.com/questions/7397768/choice-between-vectorresize-and-vectorreserve realize that in your case the correct answer is dont't preallocate manually. Just keep inserting the elements at the end as you.. at the end as you need. The vector will automatically reallocate as needed and will do it more efficiently than the manual way..
Why would you write something like this? (intentionally not using delete [] on an array) http://stackoverflow.com/questions/787417/why-would-you-write-something-like-this-intentionally-not-using-delete-on-a myClass table new myClass size ... some code that does not reallocate or change the value of the table pointer delete table no intentionally..
Does std::vector *have* to move objects when growing capacity? Or, can allocators “reallocate”? http://stackoverflow.com/questions/8003233/does-stdvector-have-to-move-objects-when-growing-capacity-or-can-allocator objects when growing capacity Or can allocators &ldquo reallocate&rdquo A different question inspired the following thought Does.. would it make sense to amend the allocator to offer a reallocate std size_t function which would return a pair pointer bool and.. missed opportunity. Worst case you could always implement reallocate size_t n as return make_pair allocate n true so there wouldn't..
What does “constant” complexity really mean? Time? Count of copies/moves? [closed] http://stackoverflow.com/questions/8631531/what-does-constant-complexity-really-mean-time-count-of-copies-moves will be very quick but every now and then it will have to reallocate space for all the data and copy every element to a new location...
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