🚀 go-pugleaf

     I have been experimenting with APL and have come up with a few questions
that someone might be able to help me with.
     What do I use for negation???!!!  Minus is shown in the equivalent char-
acter set, but negation is not to be found.  I have tried a few plausible
things with no luck.
     By the way, in an attempt to solve the above problem, I went hunting in
the source.  Where the *&$@!~*^#!!? are all the comments?  As I understand the
situation, there ARE no comments!  I would like to see a really well commented
source listing, not to modify, or find implementation "features" in, but just
to see how an APL was done.  In exchange for proof of licensing, plus what ever
other restrictions you might wish, can anyone let me see a source with comments?
     One last thing.  Has someone got a discrete Fourier transform function
written in APL?  I am looking for something with 2*n data points, maybe with
inverse DFT thrown in.  I don't need terrific speed, or huge data sets, just
something simple.  It looks like a few counters going different ways, driving
a restructure operator, with a butterfly function should do it.  If someone
has a library of relatively simple things I could learn from I would be very
appreciative.
                                               Many thanks in advance
                                               Don Taylor