¡@
c++ Programming Glossary: unordered_setFast intersection of sets: C++ vs C# http://stackoverflow.com/questions/1060648/fast-intersection-of-sets-c-vs-c-sharp in 9817.69ms Found the intersection of 504 values using unordered_set 1000 times in 24769.1ms So the set_intersection approach is.. #include time.h #include algorithm #include set #include unordered_set #include boost unordered unordered_map.hpp #include timer.h.. vector int set2 hash_map int int theMap map int int theMap unordered_set int theSet theSet.insert set1.begin set1.end int intersectionSize..
Universal less<> for pointers in C++ standard http://stackoverflow.com/questions/1098966/universal-less-for-pointers-in-c-standard of the problems with less provided for pointer types and unordered_set included too. In a few years this question will be moot. In..
http://stackoverflow.com/questions/133569/hashtable-in-c you're using C 11 you have access to the unordered_map and unordered_set headers. These provide classes std unordered_map and std unordered_set.. headers. These provide classes std unordered_map and std unordered_set . If you're using C 03 with TR1 you have access to the classes.. access to the classes std tr1 unordered_map and std tr1 unordered_set using the same headers unless you're using GCC in which case..
Correct signature of / detect presence of Container::reserve() http://stackoverflow.com/questions/14882588/correct-signature-of-detect-presence-of-containerreserve std vector but not for the unordered containers e.g. std unordered_set . The reason is that reserve is a direct member function of.. of paralleling the container requirements table 103 for unordered_set which are normative where the synopses tend more to the informative...
Good hash function for a 2d index http://stackoverflow.com/questions/2634690/good-hash-function-for-a-2d-index are really slowing things down. I want to switch to an unordered_set . So I want to have an unordered_set of Point s. Typically this.. want to switch to an unordered_set . So I want to have an unordered_set of Point s. Typically this set might contain for example every..
http://stackoverflow.com/questions/3623082/flattening-iterator implement some sort of flattening iterator For example unordered_set vector int s s.insert vector int s.insert 1 2 3 4 5 s.insert.. 4 5 s.insert 6 7 8 s.insert 9 10 11 12 flattening_iterator unordered_set vector int iterator it ... end ... for it end it cout it endl..
How to specialize std::hash<Key>::operator() for user-defined type in unordered containers? http://stackoverflow.com/questions/8157937/how-to-specialize-stdhashkeyoperator-for-user-defined-type-in-unordered containers To support user defined key types in std unordered_set Key and std unordered_map Key Value one has to provide operator.. operator const X x const return std hash int x.id std unordered_set X MyHash s It would be more convenient to write just std unordered_set.. X MyHash s It would be more convenient to write just std unordered_set X with a default hash for type X like for types coming along..
Relevant boost features vs C++11 http://stackoverflow.com/questions/8851670/relevant-boost-features-vs-c11 std swap Tuple std tuple Type Traits type_traits Unordered unordered_set unordered_map Features back ported from C 11 Atomic std atomic..
|