On Nov 17, 2008, at 13:33, mb wrote:
> vals returns a clojure.lang.APersistentMap$ValSeq, which
> is not a list. Hence list? returns false and you get the true
> branch, ie. the thing itself.
Ahhhh..... It looks like a list, but it isn't a list.
> I know. It doesn't help much, but it shows, that you have to take
> care to distinguish the abstraction vs. the specific implementation.
That's fine with me in principle, but not if the language makes an
effort to hide the implementation from me.
A fix that works (at least for the examples I tried) is
(defn replace-syms
[sym-map expr]
(let [replace #(replace-syms sym-map %)]
(cond (contains? sym-map expr) (get sym-map expr)
(vector? expr) (into [] (map replace expr))
(map? expr) (into {} (map replace (seq expr)))
(set? expr) (set (map replace expr))
(seq? expr) (map #(replace-syms sym-map %) expr)
:else expr)))
I have moved the seq? test to the end just in case that one day
vectors, sets, or maps implement the seq interface as well.
Thanks for your quick reply,
Konrad.
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