rendezvous with cassidoo challenge: 24.05.21

fix_inverted_punc.clj

(ns fix-inverted-punc
  (:require [clojure.test :refer [deftest is]))

(defn fix-inverted-punc [s]
  (let [sentences (->> (re-seq #".+?[.!?]" s)
                       (map str/trim))]
    (->> sentences
         (map (fn [sentence]
                (let [first-char (first sentence)
                      last-char  (last sentence)]
                  (cond
                    (#{\¡ \¿} first-char) sentence
                    (= \! last-char) (str "¡" sentence)
                    (= \? last-char) (str "¿" sentence)
                    :else sentence))))
         (str/join " "))))

(deftest fix-inverted-punc-test
  (is (= (fix-inverted-punc "Feliz cumpleaños!")
         "¡Feliz cumpleaños!"))
  (is (= (fix-inverted-punc "Ella ya se graduó de la universidad? ¡No!")                                     
         "¿Ella ya se graduó de la universidad? ¡No!")))

fix_inverted_punc.rs

pub fn fix_inverted_punc(s: &str) -> String {
    let sentence_endings = ['.', '!', '?'];
    let sentences: Vec<&str> = s
        .split_inclusive(&sentence_endings)
        .map(|s| s.trim())
        .collect();

    let new_sentences: Vec<String> = sentences
        .iter()
        .map(|sentence| {
            let mut chars = sentence.chars();
            let first_char = chars.next().unwrap();

            if first_char == '¡' || first_char == '¿' {
                sentence.to_string()
            } else if let Some(last_char) = chars.next_back() {
                let new_first = match last_char {
                    '!' => '¡',
                    '?' => '¿',
                    _ => last_char,
                };

                format!("{}{}", new_first, sentence)
            } else {
                sentence.to_string()
            }
        })
        .collect();

    new_sentences.join(" ")
}

#[test]
fn fix_inverted_punc_test() {
    let s1 = "Feliz cumpleaños!";
    let s2 = "Ella ya se graduó de la universidad? ¡No!";

    assert_eq!(fix_inverted_punc(s1), "¡Feliz cumpleaños!");
    assert_eq!(
        fix_inverted_punc(s2),
        "¿Ella ya se graduó de la universidad? ¡No!"
    );
}