std::stable_partition

 

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definiert in Header <algorithm>
template<class BidirIt, class UnaryPredicate > BidirIt stable_partition( BidirIt first, BidirIt last, UnaryPredicate p );

Ordnet die Elemente im Bereich [first, last) derart, daß alle Elemente für die das Prädikat p kehrt true vorausgehen, für die die Elemente Prädikats p kehrt false. Relative Reihenfolge der Elemente erhalten ist .

Original:

Reorders the elements in the range [first, last) in such a way that all elements for which the predicate p returns true precede the elements for which predicate p returns false. Relative order of the elements is preserved.

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Parameter

first, last	-	der Bereich von Elementen neu zu ordnen Original: the range of elements to reorder The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
p	-	unary predicate which returns ​true wenn das Element sollte vor anderen Elementen bestellt werden Original: if the element should be ordered before other elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. . The signature of the predicate function should be equivalent to the following:  bool pred(const Type &a); The signature does not need to have const&, but the function must not modify the objects passed to it. The type Type must be such that an object of type BidirIt can be dereferenced and then implicitly converted to Type. ​
Type requirements
- BidirIt must meet the requirements of ValueSwappable and BidirectionalIterator.
- The type of dereferenced BidirIt must meet the requirements of MoveAssignable and MoveConstructible.

Rückgabewert

Iterator das erste Element der zweiten Gruppe

Original:

Iterator to the first element of the second group

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Komplexität

Genau last-first Anwendungen des Prädikats und höchstens (last-first)*log(last-first) Swaps, wenn es nicht genügend Arbeitsspeicher oder lineare Anzahl von Swaps, wenn genügend Speicherplatz vorhanden ist .

Original:

Exactly last-first applications of the predicate and at most (last-first)*log(last-first) swaps if there is insufficient memory or linear number of swaps if sufficient memory is available.

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Beispiel

#include <iostream>#include <algorithm>   int main(){std::vector<int> v{0, 0, 3, 0, 2, 4, 5, 0, 7}; std::stable_partition(v.begin(), v.end(), [](int n){return n>0;});for(int n : v){std::cout<< n <<' ';}std::cout<<'\n';}

Output:

3 2 4 5 7 0 0 0 0

Siehe auch

partition	teilt einen Bereich von Elementen in zwei Gruppen Original: divides a range of elements into two groups The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template)