On Apr 30, 8:16 pm, Nathan Sorenson <n...@sfu.ca> wrote:
> Yes but the contract of subvec is that it returns a "persistent
> vector" and the resulting data structure returns "true" under the
> "vector?" predicate. I know that subvec returns a different type
> because I've looked at the Java source code but that's a leaky
> abstraction.
>

Agreed, looks like a bug to me. I'll see if I can fix it in the
separate clj-ds project, which you can then use until there is an
official clojure fix.

Karl



> On Apr 30, 10:57 am, Ken Wesson <kwess...@gmail.com> wrote:
>
>
>
> > On Sat, Apr 30, 2011 at 11:27 AM, Armando Blancas
>
> > <armando_blan...@yahoo.com> wrote:
> > > On Apr 29, 10:54 am, Nathan Sorenson <n...@sfu.ca> wrote:
> > >> (transient (subvec [1 2 3 4 5] 0 2)) fails with a class cast
> > >> exception. Is this expected/unavoidable? How do I know whether the
> > >> vectors I'm passed are regular vectors or come via subvec?
>
> > >> I'm assuming I lose all the performance benefits of subvec if I
> > >> defensively pour all vectors into a new vector before calling
> > >> transient?
>
> > >> I'm on clojure 1.3.0-alpha4
>
> > > Check this out:http://clojure.org/Transients
>
> > There is no mention of subvec on that page.

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