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c++ Programming Glossary: m.endHow to retrieve all keys (or values) from a std::map? http://stackoverflow.com/questions/110157/how-to-retrieve-all-keys-or-values-from-a-stdmap int m vector int keys Retrieve all keys transform m.begin m.end back_inserter keys RetrieveKey Dump all keys copy keys.begin.. int m vector int v for map int int iterator it m.begin it m.end it v.push_back it first cout it first n Or even simpler if you..
Using a std::tuple as key for std::unordered_map http://stackoverflow.com/questions/11408934/using-a-stdtuple-as-key-for-stdunordered-map d auto itr m.find std make_tuple std string abc 1 'X' if m.end itr std cout x itr second.x return 0 Error Error 1 error C2664..
a C++ hash map that preserves the order of insertion [duplicate] http://stackoverflow.com/questions/1899564/a-c-hash-map-that-preserves-the-order-of-insertion It Map m m 11 0 m 0 1 m 21 2 for It it m.begin it m.end it cout it first it second endl return 0 However I am looking..
How to find if a given key exists in a C++ std::map http://stackoverflow.com/questions/1939953/how-to-find-if-a-given-key-exists-in-a-c-stdmap
http://stackoverflow.com/questions/2333728/stdmap-default-value typename std map K V const_iterator it m.find key if it m.end return defval else return it second int main map string int..
How to loop through a c++ map [duplicate] http://stackoverflow.com/questions/4844886/how-to-loop-through-a-c-map iterator it_type for it_type iterator m.begin iterator m.end iterator iterator first key iterator second value Repeat if..
Returning the greatest key strictly less than the given key in a C++ Map http://stackoverflow.com/questions/529831/returning-the-greatest-key-strictly-less-than-the-given-key-in-a-c-map it m.lower_bound k if it m.begin return it return m.end template typename Map typename Map iterator greatest_less Map.. iterator it m.lower_bound k if it m.begin return it return m.end The template should work for std set too. share improve this..
What is the fastest way to change a key of an element inside std::map http://stackoverflow.com/questions/5743545/what-is-the-fastest-way-to-change-a-key-of-an-element-inside-stdmap do this rebalancing and stuff iterator i m.find 33 if i m.end i first 22 But so far the only way I know about to change the.. value back with a different key iterator i m.find 33 if i m.end value i second m.erase i m 22 value This seems rather inefficient..
C++ how to copy a map to a vector http://stackoverflow.com/questions/684475/c-how-to-copy-a-map-to-a-vector int i 0 i 10 i m i i i vector pair int int v copy m.begin m.end back_inserter v sort v.begin v.end cmp for int i 0 i v.size..
++it or it++ when iterating over a map? http://stackoverflow.com/questions/6926930/it-or-it-when-iterating-over-a-map Set FMap m const Foo f for FMap iterator it m.begin end m.end it end it it second f ### File 2 only ### void Set FMap m const.. Set FMap m const Foo f for FMap iterator it m.begin it m.end it it second f ### File 3 only ### void Set FMap m const Foo.. Set FMap m const Foo f for FMap iterator it m.begin it m.end it it second f ### end ### After compiling with g S O3 GCC 4.6.1..
Copy map values to vector in STL http://stackoverflow.com/questions/771453/copy-map-values-to-vector-in-stl v populate map somehow for MapType iterator it m.begin it m.end it v.push_back it second which I would probably re write as..
How to copy_if from map to vector? http://stackoverflow.com/questions/8137869/how-to-copy-if-from-map-to-vector int m m 1 1 m 2 2 m 3 3 m 4 4 m 5 5 std copy_if m.begin m.end v.begin const std pair std string int it return 0 it.second..
How should std::map be used with a value that does not have a default constructor? http://stackoverflow.com/questions/8337398/how-should-stdmap-be-used-with-a-value-that-does-not-have-a-default-constructo construction std map int X iterator it m.find 5 if it m.end m second x else m insert std make_pair 5 x Which I believe will..
http://stackoverflow.com/questions/9515357/map-lambda-remove-if 100 Foo i int removeId 6 Error here std remove_if m.begin m.end const FooMap value_type item return item.second._id removeId..
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