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std::is_heap_until

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< cpp‎ | algorithm

 
 
Algoritmo biblioteca
Funciones
Original:
Functions
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Para no modificar la secuencia de las operaciones
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Non-modifying sequence operations
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Modificación de la secuencia de operaciones
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Modifying sequence operations
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Particionamiento operaciones
Original:
Partitioning operations
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Clasificación de las operaciones (en rangos ordenados)
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Sorting operations (on sorted ranges)
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Las operaciones binarias de búsqueda (en rangos ordenados)
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Binary search operations (on sorted ranges)
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Conjunto de operaciones (en rangos ordenados)
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Set operations (on sorted ranges)
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Operaciones del montón
Original:
Heap operations
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is_heap
is_heap_until(C++11)
make_heap
Mínimo / máximo de operaciones
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Minimum/maximum operations
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Operaciones numéricas
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Numeric operations
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C biblioteca
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C library
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Defined in header <algorithm>
template< class RandomIt >
RandomIt is_heap_until( RandomIt first, RandomIt last );
(1) (desde C++11)
template< class RandomIt, class Compare >
RandomIt is_heap_until( RandomIt first, RandomIt last, Compare comp );
(2) (desde C++11)
Examina la [first, last) rango y encuentra la más amplia gama en principio first que es' montón. La primera versión de la función utiliza operator< para comparar los elementos, el segundo utiliza la función de comparación dado comp .
Original:
Examines the range [first, last) and finds the largest range beginning at first which is heap. The first version of the function uses operator< to compare the elements, the second uses the given comparison function comp.
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Contenido

[editar] Parámetros

first, last -
la gama de elementos a examinar
Original:
the range of elements to examine
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comp - comparison function which returns ​true if the first argument is less than the second.

The signature of the comparison function should be equivalent to the following:

 bool cmp(const Type1 &a, const Type2 &b);

The signature does not need to have const &, but the function must not modify the objects passed to it.
The types Type1 and Type2 must be such that an object of type RandomIt can be dereferenced and then implicitly converted to both of them. ​

Type requirements
-
RandomIt must meet the requirements of RandomAccessIterator.

[editar] Valor de retorno

El límite superior de la gama más grande de comienzo en first que es montón'. Es decir, el iterador it último para el que es amplia [first, it) montón' .
Original:
The upper bound of the largest range beginning at first which is heap. That is, the last iterator it for which range [first, it) is heap.
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[editar] Complejidad

Lineal en la distancia entre first y last
Original:
Linear in the distance between first and last
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[editar] Notas

Un montón' es una serie de elementos [f,l) que tiene las siguientes propiedades:
Original:
A heap is a range of elements [f,l) that has the following properties:
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  • *f es el elemento más grande en el intervalo
    Original:
    *f is the largest element in the range
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  • un elemento nuevo puede añadirse utilizando std::push_heap()
    Original:
    a new element can be added using std::push_heap()
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  • el primer elemento se puede eliminar con std::pop_heap()
    Original:
    the first element can be removed using std::pop_heap()
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La disposición real de los elementos depende de la implementación .
Original:
The actual arrangement of the elements is implementation defined.
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[editar] Ejemplo

#include <iostream>
#include <algorithm>
 
int main()
{
    std::vector<int> v { 3, 1, 4, 1, 5, 9 };
 
    std::make_heap(v.begin(), v.end());
 
    // probably mess up the heap
    v.push_back(2);
    v.push_back(6);
 
    auto heap_end = std::is_heap_until(v.begin(), v.end());
 
    std::cout << "all of v: ";
    for (auto i : v) std::cout << i << ' ';
    std::cout << '\n';
 
    std::cout << "only heap: ";
    for (auto i = v.begin(); i != heap_end; ++i) std::cout << *i << ' ';
    std::cout << '\n';
}

Output:

all of v:  9 5 4 1 1 3 2 6 
only heap: 9 5 4 1 1 3 2

[editar] Ver también

checks if the given range is a heap
(función de plantilla) [edit]