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In more details it is implemented using hybrid of QuickSort, HeapSort and InsertionSort.By default, it uses QuickSort but if QuickSort is doing unfair partitioning and taking more than N*logN time, it switches to HeapSort and when the array size becomes really small, it switches to InsertionSort.
As of September 2020, it appears that libc++ std::sort happens to be stable for all ranges of size less than 31, and libstdc++ std::sort happens to be stable for all ranges of size less than 17. (Do not rely on this little factoid in production!)
Sort is an in-built function in a C++ STL ( Standard Template Library). This function is used to sort the elements in the range in ascending or descending order.
Sort. The std::sort is a sorting function that uses the Introsort algorithm and have the complexity of O(N log(N)) where N= std::distance(first, last) since C++11 and the order of equal elements is not guaranteed to be preserved[3].
I wonder if there is support in STL for this:
Say I have an class like this :
class Person { public: int getAge() const; double getIncome() const; .. .. }; and a vector:
vector<Person*> people; I would like to sort the vector of people by their age: I know I can do it the following way:
class AgeCmp { public: bool operator() ( const Person* p1, const Person* p2 ) const { return p1->getAge() < p2->getAge(); } }; sort( people.begin(), people.end(), AgeCmp() ); Is there a less verbose way to do this? It seems overkill to have to define a whole class just because I want to sort based on an 'attribute'. Something like this maybe?
sort( people.begin(), people.end(), cmpfn<Person,Person::getAge>() ); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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