feat: solved 8th stage of the Hyperskill project "Hangman"

Author: sswietoniowski

hyperskill/09_hangman/08/.gitkeep

@@ -0,0 +1,106 @@
+const input = require('sync-input');
+
+const readLetter = (revealedWord) => {
+    let letter;
+    while (true) {
+        console.log(revealedWord)
+        letter = input("Input a letter: ");
+        if (letter.length !== 1) {
+            console.log("Please, input a single letter.");
+        } else if (!letter.match(/[a-z]/)) {
+            console.log("Please, enter a lowercase letter from the English alphabet.");
+        } else {
+            break;
+        }
+    }
+
+    return letter;
+}
+
+const showBanner = () => {
+    console.log("H A N G M A N");
+    console.log();
+}
+
+const chooseWord = () => {
+    const words = ["python", "java", "swift", "javascript"];
+    return words[Math.floor(Math.random() * words.length)];
+}
+
+const revealWord = (word, guessedLetters) => {
+    let revealedWord = "";
+    for (let i = 0; i < word.length; i++) {
+        if (guessedLetters.has(word[i])) {
+            revealedWord += word[i];
+        } else {
+            revealedWord += "-";
+        }
+    }
+
+    return revealedWord;
+}
+
+let wins = 0;
+let losses = 0;
+
+const showResult = (revealedWord, word) => {
+    if (revealedWord === word) {
+        console.log(`You guessed the word ${word}!`);
+        console.log("You survived!");
+        wins++;
+    } else {
+        console.log("You lost!");
+        losses++;
+    }
+}
+
+const game = () => {
+    const word = chooseWord();
+
+    let revealedWord = "-".repeat(word.length);
+    let alreadyGuessed = new Set();
+
+    let lives = 8;
+    while (lives > 0 && revealedWord !== word) {
+        const letter = readLetter(revealedWord);
+
+        if (alreadyGuessed.has(letter)) {
+            console.log("You've already guessed this letter.");
+        } else if (word.includes(letter)) {
+            alreadyGuessed.add(letter);
+            revealedWord = revealWord(word, alreadyGuessed);
+        } else {
+            console.log("That letter doesn't appear in the word");
+            alreadyGuessed.add(letter);
+            lives--;
+        }
+    }
+
+    showResult(revealedWord, word);
+}
+
+const showMenu = () => {
+    return input(`Type "play" to play the game, "results" to show the scoreboard, and "exit" to quit:`);
+}
+
+const hangman = () => {
+    showBanner();
+
+    while (true) {
+        switch (showMenu()) {
+            case "play":
+                game();
+                break;
+            case "results":
+                console.log(`You won: ${wins} times.`);
+                console.log(`You lost: ${losses} times.`);
+                break;
+            case "exit":
+                return;
+            default:
+                console.log("Invalid command!");
+        }
+    }
+}
+
+hangman();

hyperskill/09_hangman/08/main.js

@@ -32,7 +32,9 @@ There are no certificates for this track yet.
 
 [My](https://hyperskill.org/profile/7889902) solutions to [Hyperskill](https://hyperskill.org) projects from the [JavaScript Core](https://hyperskill.org/tracks/32) track.
 
-| Project                                       | Level  | Status      |
-| --------------------------------------------- | ------ | ----------- |
-| [Chalkboard Printer](./08_chalkboard_printer) | Medium | Completed   |
-| [Hangman (JavaScript)](./09_hangman)          | Hard   | In Progress |
+| Project                                       | Level  | Status    |
+| --------------------------------------------- | ------ | --------- |
+| [Chalkboard Printer](./08_chalkboard_printer) | Medium | Completed |
+| [Hangman (JavaScript)](./09_hangman)          | Hard   | Completed |
+
+My [certificate](https://hyperskill.org/certificates/e4756834-a763-4bf1-9cf4-3e1cb141ca51.pdf) of completion the track.