Execute foo in your APL where
{del} z {is} foo ; {quadio}
z {is} {iota} 0
{del}
----- Original Message -----
From: ramacd <[EMAIL PROTECTED]>
Date: Friday, March 16, 2007 12:19 pm
Subject: Re: [Jgeneral] definition of a:
> Hi Roger;
>
> Ok, I'm stumped: how does {iota}0 depend on {quad}io?
>
> >: ...
> ----- Original Message -----
> From: "Roger Hui" <[EMAIL PROTECTED]>
> To: "General forum" <[email protected]>
> Sent: Friday, March 16, 2007 12:49 PM
> Subject: Re: [Jgeneral] definition of a:
>
>
> > I started using {rho}0 to denote the empty list
> > in APL because (a) it is shorter than 0{rho}0
> > (b) it does not depend on {quad}io like {iota}0
> > does (c) it has right "type" where '' does not.
> > >From APL to J {rho}0 got changed to $0.
> >
> > Of course strictly speaking it should be "an empty
> > list" rather than "the empty list". But the
> > differences between the various empty lists are
> > more amusing than significant. When I was a mere
> > pup I used to pester and annoy the APL implementers
> > with questions like: What is the difference
> > between ({iota}0),'' and '',({iota}0) and why?
> > I guess payback exists after all.
> >
> >
> >
> > ----- Original Message -----
> > From: [EMAIL PROTECTED]
> > Date: Wednesday, March 14, 2007 1:56 pm
> > Subject: Re: [Jgeneral] definition of a:
> >
> > > The" weather" comment is funny but as I said: "I am from a
> > > different
> > > cultural background" so making fun of my mistakes in English
> is
> > > fine with
> > > me,since I have a good sense of humor.
> > >
> > > The empty list is exactly what I wanted (refer to the early
> > > discussions of
> > > <i.0
> > >
> > > The question was, as everyone can read from my earlier post:
> > > Roger ! any enlightening comment ?
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