There's a change I am tempted to make, but I think it would make the code more complex.
So, instead, here's some "simplifications": http://pastebin.com/xa5cgLwF Here's a brief recap of my thinking: J nouns know how big they are, so we should not add complexity to our data structures to keep a redundant copy of this kind of information. J verbs like to deal with collections, and letting them do that can eliminate redundant processing. J adverbs can generate "bytecode" if we keep their jobs simple enough, so that's probably good. We should be able to make g be a rank 3 array without any other code changes (our starting and ending locations would also have to have 3 elements). Untested. Instead of reversing our lists of indices every time we use them, why not just transpose the grid once? (You can always add an explicit rank to a verb if you feel like writing one that doesn't want to deal with collections. So I think that these changes should be fine from a modularity point of view.) FYI, -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
