reciprocal.hpp

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#pragma once
 
#include <complex>
 
#include "NumCpp/Core/Internal/StaticAsserts.hpp"
#include "NumCpp/Core/Internal/StdComplexOperators.hpp"
#include "NumCpp/Core/Internal/StlAlgorithms.hpp"
#include "NumCpp/Core/Types.hpp"
#include "NumCpp/NdArray.hpp"
 
namespace nc
{
    //============================================================================
    // Method Description:
    template<typename dtype>
    NdArray<double> reciprocal(const NdArray<dtype>& inArray)
    {
        STATIC_ASSERT_ARITHMETIC(dtype);
 
        NdArray<double> returnArray(inArray.shape());
 
        uint32 counter = 0;
        std::for_each(inArray.cbegin(),
                      inArray.cend(),
                      [&returnArray, &counter](dtype value) noexcept -> void
                      { returnArray[counter++] = 1. / static_cast<double>(value); });
 
        return returnArray;
    }
 
    //============================================================================
    // Method Description:
    template<typename dtype>
    NdArray<std::complex<double>> reciprocal(const NdArray<std::complex<dtype>>& inArray)
    {
        STATIC_ASSERT_ARITHMETIC(dtype);
 
        NdArray<std::complex<double>> returnArray(inArray.shape());
 
        uint32 counter = 0;
        std::for_each(inArray.cbegin(),
                      inArray.cend(),
                      [&returnArray, &counter](std::complex<dtype> value) -> void
                      { returnArray[counter++] = std::complex<double>(1.) / complex_cast<double>(value); });
 
        return returnArray;
    }
} // namespace nc