Hi Stephan,
This is invalid:
... >r [ r> ... >r ] some-combinator r> ;
Combinators use >r/r> internally, and as you can see in the
documentation you are only supposed to use >r/r> within a single quotation.
In your case it is better to use 2map instead of 2each, and you won't
need to use ?push or V{ } clone or anything like that.
Also 0 swap [a,b] is already in the library, its called [0,b].
Slava
Stephan Rudlof wrote:
> ! this variant does not work: don't know, why
> : sliceIndicesn ( seqLen sliceLen -- indices )
> f >r 2dup swap [a,b] >r - 0 swap [a,b] r> [ 2array r> ?push >r ] 2each
> r> ;
>
> I don't understand, why the '>r', 'r>' mechanism in the second variant fails:
> probably because "Concretely, a quotation is an immutable sequence of
> objects,..." (from the docs).
> Is there a better alternative to the first variant?
>
>
> Regards,
> Stephan
>
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