Add Mapping With An Index as a clojure til.

2026-01-03 07:08:01 +00:00 · 2015-12-12 14:17:01 -06:00
parent d4f513cd62
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--- a/clojure/mapping-with-an-index.md
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+# Mapping With An Index
+
+If you're mapping over a collection and you need an index for each item, you
+can reach for `map-indexed`. The `map-indexed` function can be used like so:
+
+```clojure
+> (def foods ["pizza" "hotdog" "chicken alfredo"])
+#'cljs.user/foods
+> (map-indexed (fn [idx item] (str idx " - " item)) foods)
+("0 - pizza" "1 - hotdog" "2 - chicken alfredo")
+```