On 4/8/2013 8:44 AM, Bruno Luong wrote: > dpb <firstname.lastname@example.org> wrote in message <email@example.com>... >> On 4/8/2013 8:22 AM, zack00 wrote: > >> >> Probably better than actually shifting columns would be to simply keep >> a pointer to the next column to use modulo Ncols instead. >> > > Why it is better? > Whereas the array is rearranged later with modulo, or at the begining > without, the data in the memory get moved by the same amount.
Why does he ever _need_ to rearrange memory at all? All he needs is the pointer to and use the desired column(s).