[EMAIL PROTECTED] wrote:
------------------------------
Message: 8
Date: Fri, 12 Sep 2008 09:43:53 -0700
From: Roger Hui <[EMAIL PROTECTED]>
Subject: Re: [Jgeneral] Verb Sequences - u@:v and [EMAIL PROTECTED]
To: General forum <[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
> > For example, compare:
> > 3 :'10+y'&.^. 2 3 5
> > 10&+&.^. 2 3 5
>
> For the explicit version, I think it's clearer as:
>
> ^ 10 + ^. 2 3 5
>
> and from this you get the explicit verb (3 : '^ 10 + ^. y') .
This version loses the insight that there is a "dual":
10&+ under logarithms.
That's true, and I agree that the tacit version with &. is better for
the final verb. But I might want to build the verb in stages, checking
at each stage that results are sensible, to make it easier to find out
what's going on when surprising things happen:
load 'plot'
plot 1x10&* i: 5 NB. Works
plot 10&+&.^. i: 5 NB. Fails
|domain error: glcmds
| glcmds buf
1x10&* _1
_22026.5
10&+&.^. _1
_22026.5j2.69737e_12
----- Original Message -----
From: 0j1 <[EMAIL PROTECTED]>
Date: Friday, September 12, 2008 9:37
Subject: Re: [Jgeneral] Verb Sequences - u@:v and [EMAIL PROTECTED]
To: [email protected]
> > Raul Miller rauldmiller at gmail.com wrote
> > Fri Sep 12 22:18:58 HKT 2008
> > On Fri, Sep 12, 2008 at 10:07 AM, 0j1 <j at
> asteroid.demon.co.uk> wrote:
> >> It's harder to write tacit code than explicit and harder to
> debug it
> >> when it doesn't work.
> >
> > In my opinion, this depends on the length of the code.
> (And on your
> > background.)
> >
> > Also, in my opinion, the advantage of tacit code (other than speed)
> > is that some manipulations are easier with tacit code than explicit
> > code.
>
> Agreed.
>
> > For example, compare:
> > 3 :'10+y'&.^. 2 3 5
> > 10&+&.^. 2 3 5
>
> For the explicit version, I think it's clearer as:
>
> ^ 10 + ^. 2 3 5
>
> and from this you get the explicit verb (3 : '^ 10 + ^. y') .
>
> > Of course, indirect manipulations are sometimes superior
> > 1x10 * 2 3 5
> >
> > --
> > Raul
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