std::list::empty

 

C++

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Biblioteca de operaciones atómicas (C++11)

Biblioteca de hilos/subprocesos (C++11)

 

Biblioteca de contenedores

array (C++11)

vector

deque

forward_list (C++11)

list

set

multiset

map

multimap

unordered_set (C++11)

unordered_multiset (C++11)

unordered_map (C++11)

unordered_multimap (C++11)

stack

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std::list

Las funciones miembro Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

list::list

list::~list

list::operator=

list::assign

list::get_allocator

Elemento acceso Original: Element access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

list::front

list::back

Los iteradores Original: Iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

list::beginlist::cbegin (C++11)

list::endlist::cend (C++11)

list::rbeginlist::crbegin (C++11)

list::rendlist::crend (C++11)

Capacidad Original: Capacity The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

list::empty

list::size

list::max_size

Modificadores Original: Modifiers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

list::clear

list::insert

list::emplace (C++11)

list::erase

list::push_front

list::emplace_front (C++11)

list::pop_front

list::push_back

list::emplace_back (C++11)

list::pop_back

list::resize

list::swap

Operaciones Original: Operations The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

list::merge

list::splice

list::removelist::remove_if

list::reverse

list::unique

list::sort

 

bool empty() const;

Comprueba si el contenedor no tiene elementos, es decir, si begin() == end() .

Original:

Checks if the container has no elements, i.e. whether begin() == end().

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Parámetros

(Ninguno)

Original:

(none)

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Valor de retorno

true si el recipiente está vacío, false lo contrario

Original:

true if the container is empty, false otherwise

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Excepciones

noexcept specification:  

noexcept

  (desde C++11)

Complejidad

Constant

Original:

Constant

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Ejemplo

El código siguiente utiliza empty para comprobar si un std::list<int> contiene elementos:

Original:

The following code uses empty to check if a std::list<int> contains any elements:

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#include <list>
#include <iostream>
 
int main()
{
    std::list<int> numbers;
    std::cout << "Initially, numbers.empty(): " << numbers.empty() << '\n';
 
    numbers.push_back(42);
    numbers.push_back(13317); 
    std::cout << "After adding elements, numbers.empty(): " << numbers.empty() << '\n';
}

Salida:

Initially, numbers.empty(): 1
After adding elements, numbers.empty(): 0

See also

size	devuelve el número de elementos Original: returns the number of elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (función miembro público)