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From: weg@convx1.ccit.arizona.edu (Eythan Weg)
Newsgroups: comp.lang.apl
Subject: J questions
Message-ID: <WEG.91Apr2170248@convx1.convx1.ccit.arizona.edu>
Date: 3 Apr 91 00:02:48 GMT
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Distribution: comp
Organization: University of Arizona, Economics Dept.
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Hi there:
I have a few questions to J-wise people:

1) Let us define a conjunction say t=.2 :  ' x. y.'.
   Suppose I do +/ t 1 2.  The answer is 3.  Now suppose a=.2 2 $1 2 3 4.
   I want t to operate on the cells of rank 1 of a.  I do I use the rank
   conjunction to obtain the sum of the rows of a?  I want to use t.

2) Is there a way to use J in a filter like cat file|J|awk|J...?

3) Quite generally can one imagine J acting as a shell?

Thanks, Eythan