[Sync Iteration] javascript/elyses-destructured-enchantments/1

solutions/javascript/elyses-destructured-enchantments/1/enchantments.js

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+/// <reference path="./global.d.ts" />
+// @ts-check
+
+/**
+ * Get the first card in the given deck
+ *
+ * @param {Card[]} deck
+ *
+ * @returns {Card} the first card in the deck
+ */
+export function getFirstCard(deck) {
+   const [first] = deck;
+  return first;
+}
+
+/**
+ * Get the second card in the given deck
+ *
+ * @param {Card[]} deck
+ *
+ * @returns {Card} the second card in the deck
+ */
+export function getSecondCard(deck) {
+    const [,second] = deck;
+  return second;
+}
+
+/**
+ * Switch the position of the two cards
+ *
+ * @param {[Card, Card]} deck
+ *
+ * @returns {[Card, Card]} new deck with the 2 cards swapped
+ */
+export function swapTwoCards(deck) {
+  const [first,second,...rest] = deck;
+  return [second, first,...rest];
+
+}
+
+/**
+ * Rotate (shift) the position of the three cards (by one place)
+ *
+ * @param {[Card, Card, Card]} deck
+ *
+ * @returns {[Card, Card, Card]} new deck with the 3 cards shifted by one position
+ */
+export function shiftThreeCardsAround(deck) {
+  const [first,second,third,...rest] = deck;
+  return [second,third,first,... rest];
+}
+
+/**
+ * Grab the chosen pile from the available piles
+ *
+ * @param {{ chosen: Card[], disregarded: Card[] }} piles
+ *
+ * @returns {Card[]} the pile named chosen
+ */
+export function pickNamedPile({chosen }) {
+  // 🚨 Do NOT use piles.chosen or piles.disregarded.
+
+
+  return chosen;
+
+}
+
+/**
+ * Swap the chosen pile for the disregarded pile and the disregarded pile for the chosen pile
+ *
+ * @param {{ chosen: Card[], disregarded: Card[] }} piles
+ * @returns {{ chosen: Card[], disregarded: Card[] }} new piles where the two piles are swapped
+ */
+export function swapNamedPile({ chosen, disregarded }) {
+  // 🪄 Don't break the magic.
+  // 🚨 Do NOT use piles.chosen or piles.disregarded.
+  // 🚨 Do NOT touch the next line or Elyse will accidentally reveal the trick.
+
+
+   return { chosen: disregarded, disregarded: chosen };
+}