Clojure sort String values - case insensitive

Question

I'm trying to sort a map by values (case insensitive). But it seems clojure sort function is case sensitive. See below example ,

cljs.user=> (sort {:1 "A" :2 "Z" :3 "i"})
([:1 "A"] [:2 "Z"] [:3 "i"])

cljs.user=> (reverse (sort {:1 "A" :2 "Z" :3 "i"}))
([:3 "i"] [:2 "Z"] [:1 "A"])

Can anyone please suggest me a solutions for this how can I sort in clojure by case-insensitive ?

Answer 1

Java provides a case insensitive string comparator:

(def m {:1 "A" :2 "Z" :3 "i"})
(sort-by val String/CASE_INSENSITIVE_ORDER m) ;; => ([:1 "A"] [:3 "i"] [:2 "Z"])

Answer 2

this one would probably work:

user> (sort-by (comp clojure.string/lower-case val) {:1 "A" :2 "Z" :3 "i"})
;;=> ([:1 "A"] [:3 "i"] [:2 "Z"])

or for :rank from op's answer:

user> (sort-by (comp clojure.string/lower-case :rank) [{:rank "A"} {:rank "Z"} {:rank "i"}])
;;=> ({:rank "A"} {:rank "i"} {:rank "Z"})