[REBOL] Re: sorting a serie ....
From: tim:johnsons-web at: 18-Jun-2003 15:52
I'm a short man among the tall when it comes to the
talent on this list.
I split my coding time between python and rebol, and find
myself switching languages sometimes every hour.
Besides the obvious trip-ups, like confusing ':' and '='
and '=' and '==', I still stumble over the issue of
a rebol 'word', because there is no real comparison
in other languages.... the subtleties remain elusive
for me still .....
tim
* Brett Handley <[brett--codeconscious--com]> [030618 15:06]:
> Hi Arnaud,
>
> There has been plenty responses answering your problem, I just want to add a
> little more detail on the reason the solutions work.
>
> 1) A block is an ordered sequence of values.
> 2) [a b c] is a block of three values. These value are of type word! *not
> integer!*
> 3) Words can indirectly express other values. The user guide says "An
> indirectly expressed value is unknown until it is evaluated."
>
> In overview, in your example you need to sort [255 1 -1] which is a result
> of the evaluation of: REDUCE [a b c].
> Sort [red green blue] sorts the three block values - words - using their
> spelling as you have discovered.
>
> Looking at some of the solutions.
>
> Max suggested:
> print sort compose [(a) (b) (c)]
> He was creating the [255 1 -1] block first using Compose.
>
> Max and others suggested
> print sort reduce [a b c]
> As noted above Reduce creates the [255 1 -1] that is subsequently sorted.
>
> Tim suggested:
> print sort/reverse [a b c]
> This works because Print implicitly carries out a REDUCE.
>
> Hope that was useful!
> Brett.
>
> ----- Original Message -----
> From: "Arnaud" <[garcia--a2--wanadoo--fr]>
> To: <[rebol-list--rebol--com]>
> Sent: Thursday, June 19, 2003 3:32 AM
> Subject: [REBOL] sorting a serie ....
>
> >
> > Hello,
> > I try to find the minimun of a serie (print first reduce sort serie).
> >
> > the problem: the sort function works with the name of the variable instead
> > of using their values, even if a use ":"
> > example:
> > a: 255
> > b: 1
> > c: -1
> > >> print sort[:a :b :c]
> > 255 1 -1
> >
> > >> print sort[a b c]
> > 255 1 -1
> >
> > And I would like:
> > -1 1 255
> >
> > how can I do this ?
> >
> > thanks
> > arnaud
> >
> >
> > --
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> > subject, without the quotes.
> >
> >
>
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--
Tim Johnson <[tim--johnsons-web--com]>
http://www.alaska-internet-solutions.com
http://www.johnsons-web.com
