std::unordered_map::at
From cppreference.com
< cpp | container | unordered map
| T& at( const Key& key );
|
(1) | (since C++11) |
| const T& at( const Key& key ) const;
|
(2) | (since C++11) |
Returns a reference to the mapped value of the element with key equivalent to key. If no such element exists, an exception of type std::out_of_range is thrown.
Contents |
[edit] Parameters
| key | - | the key of the element to find |
[edit] Return value
Reference to the mapped value of the requested element
[edit] Exceptions
std::out_of_range if the container does not have an element with the specified key
[edit] Complexity
Average case: constant, worst case: linear in size.
[edit] See also
| access specified element (public member function) |