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From: josh@planchet.rutgers.edu (J Storrs Hall)
Newsgroups: comp.lang.apl
Subject: a new dimension
Message-ID: <Sep.20.02.36.50.1990.11172@planchet.rutgers.edu>
Date: 20 Sep 90 06:36:51 GMT
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 24

In J, function rank seems to be set to 0 when functions are
composed even though it was originally something else, e.g.

   (5&{.)&(5&*) i.10           gives the same result as
   (5&{.)"0 (5&*) i.10         and NOT the same as 
   (5&{.) (5&*) i.10           as one would expect.

Is this a bug or a feature (or an implementation limitation)?

--JoSH

ps-- the third line is equivalent to 5{.5*i.10 giving 0 5 10 15 20
as expected, but the first two yield

0  0 0 0 0
5  0 0 0 0
10 0 0 0 0
15 0 0 0 0
20 0 0 0 0
25 0 0 0 0
30 0 0 0 0
35 0 0 0 0
40 0 0 0 0
45 0 0 0 0