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    std::unordered_map::count

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    C++
     
    Bibliothèque de conteneurs
     
    std::unordered_map
    Les fonctions membres
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    Member functions
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    unordered_map::unordered_map
    unordered_map::~unordered_map
    unordered_map::operator=
    unordered_map::get_allocator
    Les itérateurs
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    Iterators
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    unordered_map::begin
    unordered_map::cbegin
    unordered_map::end
    unordered_map::cend
    Capacité
    Original:
    Capacity
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    unordered_map::erase
    unordered_map::size
    unordered_map::max_size
    Modificateurs
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    Modifiers
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    unordered_map::clear
    unordered_map::insert
    unordered_map::emplace
    unordered_map::emplace_hint
    unordered_map::erase
    unordered_map::swap
    Lookup
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    Lookup
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    unordered_map::count
    unordered_map::find
    unordered_map::equal_range
    Interface seau
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    Bucket interface
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    unordered_map::begin2
    unordered_map::end2
    unordered_map::bucket_count
    unordered_map::max_bucket_count
    unordered_map::bucket_size
    unordered_map::bucket
    Politique de hachage
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    Hash policy
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    unordered_map::load_factor
    unordered_map::max_load_factor
    unordered_map::rehash
    unordered_map::reserve
    Des observateurs
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    Observers
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    unordered_map::hash_function
    unordered_map::key_eq
     
    <tbody> </tbody>
    size_type count( const Key& key ) const;

    Retourne le nombre d'éléments avec la clé key.

    Paramètres

    key - valeur de la clé des éléments à compter

    Valeur de retour

    Nombre d'éléments avec la clé key

    Complexité

    Amortized constant on average, worst case linear in the size of the container.

    Voir aussi
    trouve l'élément avec la clé spécifique
    Original:
    finds element with specific key
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    (fonction membre publique) [edit]
    rendements varient d'éléments correspondant à une clé spécifique
    Original:
    returns range of elements matching a specific key
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    (fonction membre publique) [edit]