Run-Length Encoding

Challenge Overview

Implement run-length encoding and decoding.

Visit the run-length-encoding exercise on Exercism to read the full instructions and download the exercise files.

Community Solutions

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The following are the top 3 community solutions by stars:

Solution 1 by @shadowhnr (⭐ 3) — View on Exercism
Solution 2 by @abcdnned (⭐ 0) — View on Exercism
Solution 3 by @ArturMroz (⭐ 2) — View on Exercism

Source: Exercism clojure/run-length-encoding

💡 View Solution

(ns run-length-encoding)

(defn run-length-encode
  "encodes a string with run-length-encoding"
  [plain-text]
  (->> plain-text
       (partition-by identity)
       (mapcat (juxt count first))
       (remove #{1})
       (apply str)))