Newsgroups: comp.lang.apl
Path: utzoo!utgpu!watserv1!watmath!ljdickey
From: ljdickey@watmath.waterloo.edu (L.J.Dickey)
Subject: Re: mixing it up: The role of fractional axis brackets
Message-ID: <1991May7.145511.469@watmath.waterloo.edu>
Organization: University of Waterloo
References: <1991May6.204056.26134@yrloc.ipsa.reuter.COM>
Date: Tue, 7 May 1991 14:55:11 GMT
Lines: 24

Date: Tue, 7 May 1991 13:52:26 GMT
Lines: 26

In article <1991May6.204056.26134@yrloc.ipsa.reuter.COM>
        mgf@ipsaint.ipsa.reuter.COM (Gfeller, Martin) writes:
>no. 5166696 filed 18.58.03  mon  6 may 1991
>from mgf
>subj Re: mixing it up: The role of fractional axis brackets
>
>Branch and assignment arrows are not functional as well. J maps them 
>both to one, and calls it copula. I don't think copulas can be 
>modified by adverbs, so they're not strictly functional in J either. 
>But this is a hard area. /Martin

I dont understand this, on two counts.

    (1) There are two copulas, not one:  "=."   and  "=:"  .
    (2) Order of execution of lines in a function is controlled
        by "suite", ($.), and the suite may be modified within a
        function by doing an assignment.  I wonder if this is 
	what was meant.

It is not quite right to say that branch is mapped to assignment.