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std::{{{1}}}::count

من cppreference.com
size_type count( const Key& key ) const;
(1) قالب:mark since none
template< class K >
size_type count( const K& x ) const;
(2) قالب:mark since c++14
1) Returns the number of elements with key ‎key‎.
2) Returns the number of elements with key that compares equivalent to the value ‎x‎. This overload only participate in overload resolution if the qualified-id Compare::is_transparent is valid and denotes a type. They allow calling this function without constructing an instance of ‎Key‎.

محتويات

[تعديل] Parameters

key - key value of the elements to count
x - alternative value to compare to the keys

[تعديل] Return value

Number of elements with key ‎key‎.

[تعديل] Complexity

Logarithmic in the size of the container plus linear in the number of the elements found.

[تعديل] See also

قالب:dsc mem funقالب:dsc mem fun