size_type count( const Key& key ) const; | (1) | (since C++11) |
Returns the number of elements with key key.
Parameters
| key | - | key value of the elements to count |
Return value
Number of elements with key key.
Complexity
linear in the number of elements with key key on average, worst case linear in the size of the container.
See also
| finds element with specific key (public member function) | |
| returns range of elements matching a specific key (public member function) |
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