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c++ Programming Glossary: myvecSorting a std::map by value before output & destroy http://stackoverflow.com/questions/1367429/sorting-a-stdmap-by-value-before-output-destroy const std map std string int mymap std vector mypair myvec mymap.begin mymap.end assert myvec.size 10 std partial_sort.. mymap std vector mypair myvec mymap.begin mymap.end assert myvec.size 10 std partial_sort myvec.begin myvec.begin 10 myvec.end.. mymap.end assert myvec.size 10 std partial_sort myvec.begin myvec.begin 10 myvec.end IntCmp for int i 0 i 10 i std..
how to sum a large number of float number? http://stackoverflow.com/questions/2148149/how-to-sum-a-large-number-of-float-number clock_t start clock task_scheduler_init init vector float myvec vector float pvec for int i 0 i N i myvec.push_back 1.0f pvec.. vector float myvec vector float pvec for int i 0 i N i myvec.push_back 1.0f pvec myvec float mysum mysum parallelSum pvec.. float pvec for int i 0 i N i myvec.push_back 1.0f pvec myvec float mysum mysum parallelSum pvec cout the p sum is mysum endl..
Using read() directly into a C++ std:vector http://stackoverflow.com/questions/2780365/using-read-directly-into-a-c-stdvector a vector. Doing the write is pretty easy I can just pass myvec 0 and avoid unnecessary copying. I'd like to do the same and.. allocate appropriately vec.reserve . I can also read into myvec 0 though this is probably a VERY BAD IDEA. Obviously doing this.. a VERY BAD IDEA. Obviously doing this doesn't allow myvec.size to return anything sensible. Is there any way of doing..
Using “unique()” on a vector of vectors in C++ http://stackoverflow.com/questions/3773015/using-unique-on-a-vector-of-vectors-in-c to use unique on this Something like vector vector int myvec blah blah do something to myvec vector vector int interator.. like vector vector int myvec blah blah do something to myvec vector vector int interator it unique myvec.begin myvec.end.. something to myvec vector vector int interator it unique myvec.begin myvec.end Would the range myvec.begin to it be unique..
How to use std::foreach with parameters/modification http://stackoverflow.com/questions/476488/how-to-use-stdforeach-with-parameters-modification modification I've found myself writing for int i 0 i myvec.size i myvec i DoWhatever param a lot and I'd like to compress.. I've found myself writing for int i 0 i myvec.size i myvec i DoWhatever param a lot and I'd like to compress this into.. super verbose. I've also got things like for int i 0 i myvec.size i if myvec i IsOK myvec i DoWhatever param and I'd like..
Question about vector iterator in template functions http://stackoverflow.com/questions/5192874/question-about-vector-iterator-in-template-functions problem. This code compiles perfectly void Show vector int myvec vector int iterator it cout Vector contains for it myvec.begin.. myvec vector int iterator it cout Vector contains for it myvec.begin it myvec.end it cout it cout endl while this one gives.. int iterator it cout Vector contains for it myvec.begin it myvec.end it cout it cout endl while this one gives me an error message..
Sort a std::list<myclass*> with myclass::operator<(myclass &other) http://stackoverflow.com/questions/6404160/sort-a-stdlistmyclass-with-myclassoperatormyclass-other const T const a const T const b return a b std vector Foo myvec std list Foo mylist std sort myvec.begin myvec.end PComp Foo.. a b std vector Foo myvec std list Foo mylist std sort myvec.begin myvec.end PComp Foo mylist.sort PComp Foo By the way I.. vector Foo myvec std list Foo mylist std sort myvec.begin myvec.end PComp Foo mylist.sort PComp Foo By the way I think you cannot..
How to enforce move semantics when a vector grows? http://stackoverflow.com/questions/8001823/how-to-enforce-move-semantics-when-a-vector-grows constructors and move constructors defined. std vector A myvec If I fill up the vector with A objects using e.g. myvec.push_back.. A myvec If I fill up the vector with A objects using e.g. myvec.push_back a the vector will grow in size using the copy constructor..
How to correctly deallocate or delete a c++ vector? http://stackoverflow.com/questions/8546239/how-to-correctly-deallocate-or-delete-a-c-vector C 11 is to swap it with an empty vector vector int .swap myvec . In C 11 you have a member function shrink_to_fit which often..
The simplest and neatest c++11 ScopeGuard http://stackoverflow.com/questions/10270328/the-simplest-and-neatest-c11-scopeguard std vector int myVec std vector int someOtherVec myVec.push_back 5 first constructor.. std vector int myVec std vector int someOtherVec myVec.push_back 5 first constructor adquire happens elsewhere const.. adquire happens elsewhere const auto a RAII makeScopeGuard myVec.pop_back sintactically neater since everything happens in a..
Summing struct members inside a vector http://stackoverflow.com/questions/1030608/summing-struct-members-inside-a-vector this I'd like to do something like int sumOfA SumOfMembers myVec a but I can't conceive of how I'd put such a function together...
Class 'is not a template type' http://stackoverflow.com/questions/1590688/class-is-not-a-template-type
Get a reverse iterator from a forward iterator without knowing the value type http://stackoverflow.com/questions/1787293/get-a-reverse-iterator-from-a-forward-iterator-without-knowing-the-value-type this although the container type can vary std vector int myVec Populate myVec std sort myVec.begin myVec.end I duplicated the.. the container type can vary std vector int myVec Populate myVec std sort myVec.begin myVec.end I duplicated the prototype of.. type can vary std vector int myVec Populate myVec std sort myVec.begin myVec.end I duplicated the prototype of std sort for my..
http://stackoverflow.com/questions/4061438/what-do-i-need-to-do-before-deleting-elements-in-a-vector-of-pointers-to-dynamic memory leaks. No. You explicitly have to call delete myVec index as you iterate over all elements. Ex for int i 0 i myVec.size.. index as you iterate over all elements. Ex for int i 0 i myVec.size i delete myVec i With that said if you're planning on storing.. over all elements. Ex for int i 0 i myVec.size i delete myVec i With that said if you're planning on storing pointers in a..
Best way to extract a subvector from a vector? http://stackoverflow.com/questions/421573/best-way-to-extract-a-subvector-from-a-vector from a vector Suppose I have a std vector let's call it myVec of size N . What's the simplest way to construct a new vector.. a copy of elements X through Y where 0 X Y N 1 For example myVec 100000 through myVec 100999 in a vector of size 150000 . If.. through Y where 0 X Y N 1 For example myVec 100000 through myVec 100999 in a vector of size 150000 . If this cannot be done efficiently..
How to use std::foreach with parameters/modification http://stackoverflow.com/questions/476488/how-to-use-stdforeach-with-parameters-modification x.doWhat param private int param int main std vector X myVec std for_each myVec.begin myVec.end std bind2nd std mem_fun_ref.. private int param int main std vector X myVec std for_each myVec.begin myVec.end std bind2nd std mem_fun_ref X doWhat 4 std.. int main std vector X myVec std for_each myVec.begin myVec.end std bind2nd std mem_fun_ref X doWhat 4 std for_each myVec.begin..
C++ standard library and Boehm garbage collector http://stackoverflow.com/questions/8016945/c-standard-library-and-boehm-garbage-collector gc_cpp.h #include gc gc_allocator.h #include vector class Myvec std vector int gc_allocator int _vec public Myvec size_t sz.. class Myvec std vector int gc_allocator int _vec public Myvec size_t sz 0 _vec sz Myvec const Myvec v _vec v._vec const Myvec.. int gc_allocator int _vec public Myvec size_t sz 0 _vec sz Myvec const Myvec v _vec v._vec const Myvec operator const Myvec rhs..
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