This is pretty nifty:
user=> (require '[rmap.core :as rmap])
nil
user=> (def fibs (rmap/rmap FIBS {:a 0 :b 1 :next (-> FIBS (update-in [:a]
(constantly (:b FIBS))) (update-in [:b] (constantly (+ (:b FIBS) (:a
FIBS)))))}))
#'user/fibs
user=> (defn fib [n] (loop [fibs fibs n n] (if (zero? n) (:a fibs) (recur
(:next fibs) (dec n)))))
#'user/fib
user=> (fib 40)
102334155
On Wed, Oct 8, 2014 at 1:37 PM, Arnout Roemers <
goo...@company.romeinszoon.nl> wrote:
> Hi Zach,
>
> Thank you for checking out the library. You were right, some interfaces
> were missing and some methods had not been implemented. Though this was
> documented, they were limitations that could be fixed.
>
> *So, I'd like to announce version 0.2.0.*
>
> This version does implement all the necessary interfaces. Your source of
> def-map-type from "Potemkin" certainly helped here, although I did not
> use it directly. Nice work by the way. I have tested the current rmap
> implementation with the "collection-check" library, and it passes. Again,
> nice work, Zach.
>
> I still use a LinkedHashMap as the underlying data structure (as I want
> to keep track of the evaluation order), but I could not break that
> structure like the way you said. It seems to behave fine. Please let me
> know if you do know of a counter example.
>
> P.S. Zach, the README of the "collection-check" library is not updated
> with the dependency change to "test.check".
> P.P.S. Still working on a post about the motivation and how it works.
>
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--
Ben Wolfson
"Human kind has used its intelligence to vary the flavour of drinks, which
may be sweet, aromatic, fermented or spirit-based. ... Family and social
life also offer numerous other occasions to consume drinks for pleasure."
[Larousse, "Drink" entry]
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