Ouch! I intended "only monadic". Kip
Roger Hui wrote:
r1=: % : ('a' % 'b'"_)
r1 4
0.25
3 r1 4
|domain error: r1
| 3 r1 4
'' r1 4
|domain error: r1
| '' r1 4
4 r1 ''
|domain error: r1
| 4 r1''
----- Original Message -----
From: Kip Murray <[email protected]>
Date: Monday, March 16, 2009 15:07
Subject: Re: [Jprogramming] every box, take and ammend pattern
To: Programming forum <[email protected]>
And tacit definitions can be made monadic only by appending : [:
as in
r =: % : [: NB. reciprocal
r 4
0.25
2 r 4
|domain error: r
| 2 r 4
2 % 4
0.5
Kip Murray
Tracy Harms wrote:
During my trials, I had it locked in my head that '[: is a
suicide verb...
so how do I force a verb to be monadic'.
Steven,
If this was a question, note the last part of the Dictionary listing
for Explicit Definition:
The definitions of the monadic and dyadic cases produced by 3
: 0 are
separated by a colon on a line by itself; if none occurs, the domain
of the dyadic case is empty.
As an example:
squareroot=: 3 : '%:y'
squareroot 2
1.41421
4 squareroot 2
|domain error: squareroot
| 4 squareroot 2
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
