Hi all,
Thank you for commenting, Chris and Meikel.
In my Clojure 1.3.0 REPL,
(def sm (sorted-map 0 {:name "Alice"} 1 {:name "Bob"} 2 {:name
"Charlie"}))
(loop [c sm acc []]
(if-let [[k v] (first c)]
(recur (next c) (conj acc (assoc v :id k)))
acc))
returns
[{:name "Alice", :id 0} {:name "Bob", :id 1} {:name "Charlie", :id 2}]
. And
(nthnext sm 1)
returns
([1 {:name "Bob"}] [2 {:name "Charlie"}])
.
'first', 'next' and 'nthnext' look to accept a map for me.
Do I misunderstand something?
I only want to write an example above like:
(loop [[k v :as x] & xs] sm acc []]
(if c (recur xs (conj acc (assoc v :id k))) acc))
.
And it can be done only if 'nth' accepts a map, by implementing 'nth' using
'seq', 'first', 'next', 'loop' and 'recur' like 'nthnext' or 'my-nth' in
the first post.
https://github.com/clojure/clojure/blob/d0c380d9809fd242bec688c7134e900f0bbedcac/src/clj/clojure/core.clj#L2747
Note that the example above is done without a loop, I know, and I forced
to use a loop for a demonstrative purpose.
Regards,
Yoshinori Kohyama
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