Issue
What is the fastest way to figure out if an unordered_map container has an item with a specified key?
Solution
They will have about equal performance. You should use the algorithm that best expresses what you are trying to do.
To elaborate on that, generally count() will be implemented using find(). For example, in libcxx, count() is implemented as return (find(__k) != end());
Answered By – Bill Lynch
Answer Checked By – Pedro (BugsFixing Volunteer)