Questions about stdmap
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Cannot increment value-initialized map/set iterator
I'm trying to increment key of nodes after the index j in a map, but I got some error while incrementing the iterator to the next node, here's my code :
typedef map<int, string> My_map;
My_m...
nazim sami
Votes: 0
Answers: 2
Aggregate values of same key in std::multimap and store in std::map
I essentially want to group the elements of the multimap by key, and obtain the new data structure as a map.
the multimap:
std::multimap<std::string,std::vector<int>> multiMap;
VecA ...
Yasiru Lelwala
Votes: 0
Answers: 1
C++: insert element into std::map<MyStruct> where MyStruct can only be aggregate initialized and contains const unique pointers
Here is what I am trying to do and what I have tried:
#include <memory>
#include <map>
#include <string>
using namespace std;
struct MyStruct {
const unique_ptr<int> a;
...
Mircode
Votes: 0
Answers: 2
Why does the "[]" operator of std::map<std::string, std::string> accept a double value but gives unexpected output?
We came around the following code snipped:
std::map<std::string, std::string> m;
m["a"] = 42.0;
std::cout << "value=" << m["a"] << std::endl;
Out...
Henryk
Votes: 0
Answers: 0