Clear A Map C
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Clear A Map C
Besides, there's no need to individually erase the map elements. The idea is to iterate the map using iterators and call the unordered_map::erase function on the iterators that match the predicate. Complexity linear in size (destructions).
This member function never throws exception. We can use std::map::erase() function to erase single element or range of elements in a map. The time complexity of a map for insert, delete and search is o(n).
Removes from the map container either a single element or a range of elements ([first,last)).
The c++ function std::map::clear() destroys the map by removing all elements and sets size of map to zero. 3) removes the elements with the key value key. Let discuss these functions in detail. It returns the number of entries deleted.
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