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std::unordered_map::clear

From cppreference.com
void clear();
(since C++11)

Removes all elements from the container.

Invalidates any references, pointers, or iterators referring to contained elements. May invalidate any past-the-end iterators.

Contents

[edit] Parameters

(none)

[edit] Return value

(none)

[edit] Exceptions

noexcept specification:  
noexcept
  

[edit] Complexity

Linear in the size of the container.

[edit] See also

erases elements
(public member function) [edit]