Current column number. Columns are zero-indexed; the first column is column 0.
Total number of rows.
Total number of columns.
The index in a single-dimension structure of the
given row and column in a two-dimensional structure.
If row or column are negative, the function will return undefined.
If row is greater than or equal to totalRows, the function will return undefined.
If column is greater than or equal to totalColumns, the function will return undefined.
Current row number. Rows are zero-indexed; the first row is row 0.