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std::valarray::shift(3) C++ Standard Libary std::valarray::shift(3) NAME std::valarray::shift - std::valarray::shift Synopsis valarray<T> shift( int count ) const; Returns a new valarray of the same size with elements whose posi- tions are shifted by count elements. The new position of each element is icount where i is the previous position. The value of shifted in elements is T(). Parameters count - number of positions to shift the elements by Return value The resulting valarray with shifted elements. Notes The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties: * All const member functions of std::valarray are pro- vided. * std::valarray, std::slice_array, std::gslice_array, std::mask_array and std::indirect_array can be constructed from the re- placement type. * All functions accepting an argument of type const std::valarray& except begin() and end() (since C++11) should also accept the replacement type. * All functions accepting two arguments of type const std::valarray& should accept every combination of const std::valarray& and the replacement type. * The return type does not add more than two levels of template nesting over the most deeply-nested argument type. Example // Run this code #include <iostream> #include <valarray> int main() { std::valarray<int> v{1, 2, 3, 4, 5, 6, 7, 8}; for (auto const& val : v) { std::cout << val << " "; } std::cout << "\n"; std::valarray<int> v2 = v.shift(2); for (auto const& val : v2) { std::cout << val << " "; } std::cout << "\n"; } Output: 1 2 3 4 5 6 7 8 3 4 5 6 7 8 0 0 See also cshift circular shift of the elements of the valarray (public member function) http://cppreference.com 2022.07.31 std::valarray::shift(3)
NAME | Synopsis | Parameters | Return value | Notes | Example | Output: | See also
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