I'm not sure about filter-index - I don't see any documentation about that
word. But here's a version of map-index that fulfils your request:
USING: kernel sequences fry ;
: map-index' ( ... seq quot: ( ... elt index -- ... newelt ) -- ... newseq )
'[ [ nip @ ] map-index ] call ; inline
Loryn Jenkins
On Mon, Apr 15, 2013 at 11:12 AM, mr w <wzr...@gmail.com> wrote:
> Is there a version of filter-index that only puts the index on the
> stack, without the corresponding element?
>
>
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Precog is a next-generation analytics platform capable of advanced
analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
http://www2.precog.com/precogplatform/slashdotnewsletter
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