Shorter (but still not using [:) :
r2=: % : ('a' % 1:)
----- Original Message -----
From: Roger Hui <[email protected]>
Date: Monday, March 16, 2009 15:57
Subject: Re: [Jprogramming] every box, take and ammend pattern
To: Programming forum <[email protected]>
> 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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