What about this?
10 { [ 1 + ] [ 2 + ] [ 3 + ] } [ call( x -- y ) ] with map
The 'with' combinator gets rid of the dupd/drop pattern.
Your snippet doesn't compile because it applies 'call' to a
runtime-computed value; using call( gets around that by explicitly
declaring a stack effect for the quotation being called.
Slava
On Fri, Aug 27, 2010 at 7:34 PM, Kyle Cordes <k...@kylecordes.com> wrote:
> Hello. Warning, Factor neophyte with a bit of long-forgotten Forth
> experience...
>
> I picked up the notion, on a web page that I cannot find at the
> moment, that good style in Factor is to get rid of stack manipulation
> words, and use quots and combinators instead. I've been pushing bits
> of code around, trying to learn to do that. Here is a tiny snippet:
>
> 10 { [ 1 + ] [ 2 + ] [ 3 + ] } [ dupd call ] map . drop
>
> ... in which I'm trying to map from an array of quots to their result,
> but with a stack value (perhaps more than one?) available to the
> quots. I've done so here with the bludgeon of dupd and drop. It seems
> like a need something that is somewhat like map and somewhat like
> cleave.
>
> How should I do this? Is there another combinator that I am overlooking?
>
> --
> Kyle Cordes
> http://kylecordes.com
>
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