Henry Rich wrote:
> I abhor (= y) because it is so wasteful of space and computation.
> '(i.~ y) gives the same information more compactly. Given the chance,
> I would expunge monad = .
Please don't. I'm a happy =Self-Classify user. There are times when
I exactly need the bit matrix form yielded from "=". For example, just
today for AOC:
NB. dir + subdirs marker matrix:
sdmm =. (= + x_has_subdir_y/~) {."1 local_sizes
=/~ would have been an acceptable substitute in this specific case.
"The same information more compactly" would not really have helped me.
In a similar vein, I happend to use monadic e. (Raze In) just a few
days ago for the AOC "Rucksack Reorganization", solving 3a + 3b
with the same "finder" auxiliary. Another case of a space wasting
but sometimes really helpful boolean matrix generator.
Martin
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
