>tuple is the reverse of tuple>array
it takes a sequence where the first element is the tuple class and the rest
are the slots.
On Wed, Sep 23, 2015 at 8:44 AM, Alexander Ilin <ajs...@yandex.ru> wrote:
> Hello, John!
>
> Great!
>
> I wish that was mentioned in { $link tuple-constructors }.
>
> I now see there is >tuple, which could be equally useful.
>
> Thank you, John!
>
> 23.09.2015, 18:29, "John Benediktsson" <mrj...@gmail.com>:
> > You can use slots>tuple.
> >
> > TUPLE: em id name path ;
> > C: <em> em
> >
> > : make-em-all ( -- seq )
> > {
> > { 1 "x" "path" }
> > { 2 "y" "math" }
> > { 3 "z" "bath" }
> > } [ em slots>tuple ] map ;
> >
> > IN: scratchpad make-em-all .
> > {
> > T{ em { id 1 } { name "x" } { path "path" } }
> > T{ em { id 2 } { name "y" } { path "math" } }
> > T{ em { id 3 } { name "z" } { path "bath" } }
> > }
> >
> > On Wed, Sep 23, 2015 at 8:25 AM, Alexander Ilin <ajs...@yandex.ru>
> wrote:
> >> Hello!
> >>
> >> I'd like to return a sequence of tuples. How do I approach this?
> >> Here's what I tried (and failed) so far:
> >>
> >> TUPLE: em id name path ;
> >> C: <em> em
> >>
> >> : make-em-all ( -- seq )
> >> {
> >> { 1 "x" "path" }
> >> { 2 "y" "math" }
> >> { 3 "z" "bath" }
> >> } [ <em> ] map ;
> >>
> >> The problem here was that <em> expects three items on stack, but
> receives a sigle sequence object with three items inside.
> >> I tried to find a way to dump sequence onto the stack, but the
> following code failed to even compile due to stack effect reasons:
> >>
> >> ...
> >> } [ [ dup ] each <em> ] map ;
> >>
> >> Any advice? Basically, I wanted to declaratively setup a bunch of
> objects in a sort of init-word, put them onto stack as a sequence, and deal
> with them interactively afterwards, possibly saving to an Sqlite DB for
> future use.
> >>
> >> ---=====---
> >> Александр
> >>
> >>
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> >
> >
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>
>
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