Avatar of 4d47
0
0
Genius
0
0

4d47's solution

to Reverse String in the Clojure Track

Instructions
Test suite
Solution

Reverse a string

For example: input: "cool" output: "looc"

Source

Introductory challenge to reverse an input string https://medium.freecodecamp.org/how-to-reverse-a-string-in-javascript-in-3-different-ways-75e4763c68cb

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

reverse_string_test.clj

(ns reverse-string-test
  (:require [clojure.test :refer [deftest is]]
            reverse-string))

(deftest empty-string-test
  (is (= "" (reverse-string/reverse-string ""))))

(deftest a-word-test
  (is (= "tobor" (reverse-string/reverse-string "robot"))))

(deftest capitalised-word-test
  (is (= "nemaR" (reverse-string/reverse-string "Ramen"))))

(deftest sentence-with-punctuation-test
  (is (= "!yrgnuh m'I" (reverse-string/reverse-string "I'm hungry!"))))

(deftest palindrome-test
  (is (= "racecar" (reverse-string/reverse-string "racecar"))))
(ns reverse-string
  (:require [clojure.string :rename {reverse reverse-string}]))

(defn ^String reverse-string-1 [^CharSequence s]
  (.. (StringBuilder. s) reverse toString))

(defn ^String reverse-string-2 [^CharSequence s]
  (apply str (reverse s)))

What can you learn from this solution?

A huge amount can be learnt from reading other people’s code. This is why we wanted to give exercism users the option of making their solutions public.

Here are some questions to help you reflect on this solution and learn the most from it.

  • What compromises have been made?
  • Are there new concepts here that I could read more about to develop my understanding?