I played around with grid today, and ran into a few things that I'm not sure how to deal with -- I'm not sure whether these are my issue's or ISI's issues:
While I can create an empty grid (9 9$a:), it's not clear to me how I can make a grid element empty after it has been populated with a number. Furthermore, clearing out a grid box seems to require the use of the mouse -- I do not understand how to enter edit mode using only the keyboard. While the underlying system seems rather ornate, I do not see any way to determine the background color of a cell. I'd like a simpler system, or one offering detailed control. (In this case, I threw together a UI for Roger Hui's sudoku code, and grid's background colors don't make a lot of sense in this context.) The grid verb will create multiple grids at the same spot on the screen. Some slight difference for overlapping grid windows would be nicer. The form editor imposes some non-intuitive style constraints on its code. For example, if you insert a space to the left of the =: for the form's initial noun, the form editor will remove all spaces to the left of all =: -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
