(4 $. $.) returns the wrong shape and is incompatible for non-Boolean
arguments.
(I. y) is important not only by itself but also in the many compounds
where it is supported by special code: I.@e. for example. That's an
argument for keeping its definition restrictive if possible without
ruling out useful applications.
So, again: when would you use (# i.@$) with rank > 1?
Henry Rich
On 10/28/2021 9:44 AM, R.E. Boss wrote:
Why not define I. as (4 {. {.), which seems quite adequate to me, although it was called
"truly horrifying" by Stone
http://www.jsoftware.com/pipermail/programming/2021-October/059190.html ?
Your advise wrt #. and #: is perhaps easier to remember than Base and Antibase.
R.E. Boss
-----Original Message-----
From: Programming <[email protected]> On Behalf Of Henry
Rich
Sent: woensdag 27 oktober 2021 10:41
To: Programming forum <[email protected]>
Subject: Re: [Jprogramming] Where, oh where have my indices...
RE: #:, with multiple dots, creates a list. #. creates an atom.
Isn't I. defined as (# i.@#)"1? If you want a different rank you could specify
one. But can you give an example where you would do that?
Henry Rich
On Wed, Oct 27, 2021, 8:33 AM R.E. Boss <[email protected]> wrote:
I could not agree more.
Now I have to remember the ranks of the verbs I use, which I cannot.
(I even have to look up always some definitions, e.g. the difference
between #: and #. , perhaps I should use the mnemonics, like Alex
Rufon did, together with f. )
R.E. Boss
-----Original Message-----
From: Programming <[email protected]> On Behalf
Of Elijah Stone
Sent: woensdag 27 oktober 2021 05:33
To: [email protected]
Subject: Re: [Jprogramming] Where, oh where have my indices...
I think that primitives should try to handle as highly-ranked an array
they can. I find it much more simple and regular to explicitly lower
the rank of a verb than to recreate the high-rank version of the
algorithm myself.
(...)
-E
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