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SortRows


Unit:SDL_ntabed
Class: TNTabEd
Declaration: procedure SortRows (SortColIx: integer; Ascending: boolean; LowCol, LowRow, HighCol, HighRow: integer; IncludeHeaders: boolean);

The method SortRows provides a means to sort the rows of the table editor, or part of it, according to the values in a single column. This column is indexed by the parameter SortColIx. The matrix is sorted row by row within the range [LowCol, LowRow ] to [HighCol, HighRow ]. The values outside this range are not affected (except for the column addressed by SortColIx ). The sorting order is determined by the column SortColIdx which is also sorted within the range [LowRow, HighRow ]. The parameter Ascending specifies whether the valus are to be sorted in ascending (TRUE) or descending (FALSE) order. The parameter IncludeHeaders determines whether the row names and the columns attributes are sorted too. Note that in most cases this parameter should be set TRUE.

The sorting is performed by a modified bubble sort (CombSort), which has been reported to be comparable in speed to QuickSort (see also R.Box, S. Lacey, BYTE magazine, April 1991).

Hint: The values of the column SortColIx are always sorted, even if this column is outside the specified sort range [LowCol, HighCol ].

Example: The statement TE1.SortRows (10, true, 1, 1, TE1.NrOfColumns, TE1.NrOfRows, true) sorts the whole table TE1 according to the values in column 10.


Last Update: 2012-Oct-20