std::array::swap
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   void swap( array& other ); 
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(since C++11) | |
Exchanges the contents of the container with those of other. Does not cause iterators and references to associate with the other container.
Contents | 
[edit] Parameters
| other | - | container to exchange the contents with | 
[edit] Return value
(none)
[edit] Exceptions
For zero-sized arrays,
noexcept specification:  
noexcept(noexcept(true))
[edit] Complexity
Linear in size of the container.
[edit] See also
|    (C++11) 
 | 
   specializes the std::swap algorithm   (function template)  |