sphelper.h

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#ifndef _SP_HELPER_H_
#define _SP_HELPER_H_

class SpHelper
{
public:
    template<typename _ForwardIter, typename T>
    static void iota(_ForwardIter __first, _ForwardIter __last, T __value)
    {
        while (__first != __last)
                *__first++ = __value++;
    }
    
    template<typename T, typename I>
    static T ** allocate2D(I m, I n)
    {
        T ** array = new T*[m];
        for(I i = 0; i<m; ++i) 
            array[i] = new T[n];
        return array;
    }
    template<typename T, typename I>
    static void deallocate2D(T ** array, I m)
    {
        for(I i = 0; i<m; ++i) 
            delete [] array[i];
        delete [] array;
    }
}

#endif