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
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