>
> (def transhashmap (transient {})
(assoc transhashmap "a" 1)
(assoc transhashmap "b" 2)
etc
Isn't that what Rich was talking about, about not bashing in place?
On Fri, Aug 7, 2009 at 6:45 PM, Patrick Sullivan <
wizardofwestma...@gmail.com> wrote:
>
> I don't have the EXACT code handy to c/p (at work now) but I did
> something like the following.
> (apologies for doing it such an iterative looking way, never got
> comfortable with -> ;-))
>
> (def transhashmap (transient {})
> (assoc transhashmap "a" 1)
> (assoc transhashmap "b" 2)
> etc
>
> Then when I did (count transhashmap) I never got higher than 8.
> Perhaps something about the way it is handling strings/characters as a
> hash is broken? I know my original code that screwed me up was taking
> a long text and breaking it down into wordcounts.
>
> ~Patrick
>
> On Aug 7, 7:38 am, Christophe Grand <christo...@cgrand.net> wrote:
> > Hi Patrick !
> >
> > Can you post some code. here is what I get:
> > user=> (-> {} transient (assoc! :a 1) (assoc! :b 2) (assoc! :c 3) (assoc!
> :d
> > 4)
> > (assoc! :e 5) (assoc! :f 6) (assoc! :g 7) (assoc! :h 8) (assoc! :i 9)
> > persistent!)
> > {:a 1, :c 3, :b 2, :f 6, :g 7, :d 4, :e 5, :i 9, :h 8}
> > user=> (persistent! (reduce #(assoc! %1 (str "k" %2) %2) (transient {})
> > (range 2
> > 0)))
> > {"k0" 0, "k1" 1, "k2" 2, "k3" 3, "k4" 4, "k5" 5, "k10" 10, "k6" 6, "k11"
> 11,
> > "k7"
> > 7, "k12" 12, "k8" 8, "k13" 13, "k9" 9, "k14" 14, "k15" 15, "k16" 16,
> "k17"
> > 17,
> > "k18" 18, "k19" 19}
> >
> > Christophe
> >
> > On Fri, Aug 7, 2009 at 10:07 AM, Patrick Sullivan <
> >
> >
> >
> > wizardofwestma...@gmail.com> wrote:
> >
> > > Testing Transient w/Hashmaps (Thanks Cristophe!) and it seems like the
> > > object won't store more then 8 keys. At first I thought it was my
> > > frequency function
> > > that was rolling it up, but then I simply tried creating a transient
> > > object and manually assoc! ing a bunch of items into it. After the
> > > 8th it seemed to stop taking new
> > > keys.
> >
> > > Am I doing something silly here or is this a bug?
> >
> > > ~Patrick Sullivan
> >
> > > On Aug 6, 5:53 am, Rich Hickey <richhic...@gmail.com> wrote:
> > > > On Aug 5, 10:10 pm, Luc Prefontaine <lprefonta...@softaddicts.ca>
> > > > wrote:
> >
> > > > > I like this very much... that's the kind of clever optimizations
> that
> > > > > preserves Clojure principles and
> > > > > can yield significant performance increases. This could also help
> > > > > dealing with performance critics
> > > > > in these small mutable languages "benchmarks" that newbies attempt
> to
> > > > > clone in Clojure.
> >
> > > > > Thank's Rich !
> >
> > > > You're welcome!
> >
> > > > And special thanks to Christophe Grand, who (quickly!) applied the
> > > > same technique to the hash maps and contributed that yesterday. So
> > > > now, in the master branch, vectors and hash maps support transients.
> > > > Everyone please try them out (where appropriate :).
> >
> > > > Rich
> >
> > --
> > Professional:http://cgrand.net/(fr)
> > On Clojure:http://clj-me.blogspot.com/(en)
> >
>
--
John
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