question: rollCall

README.md

@@ -126,6 +126,7 @@ I started this in the [issue #176](https://buttondown.email/cassidoo/archive/we-
 - [368 - maxPairs](src/2024/368-maxPairs)
 - [377 - groupAnagrams](src/2024/377-groupAnagrams)
 - [378 - seeBuildingsLeft](src/2024/378-seeBuildingsLeft)
+- [381 - rollCall](src/2024/381-rollCall)
 </details>
 
 ## Installing & Running

src/2024/381-rollCall/README.md

@@ -0,0 +1,24 @@
+# rollCall
+
+Interview question of the [issue #381 of rendezvous with cassidoo](https://buttondown.com/cassidoo/archive/how-beautiful-it-is-to-get-up-and-go-do-something/).
+
+## The Question
+
+**Santa is conducting his daily roll call for the reindeer, but the printer has mistakenly printed all their names backwards. To take attendance properly, he urgently needs a tool to reverse the reindeer names and put them in alphabetical order! Can you help Santa?**
+
+Example:
+
+```js
+rollCall(["yzneT","ydissaC","enimA"])
+["Amine","Cassidy","Tenzy"]
+
+rollCall(["rennuD","nexiV","recnarP","temoC","neztilB","recnaD","diduC","rehsaD","hploduR"])
+["Blitzen","Comet","Cupid","Dancer","Dasher","Donner","Prancer","Rudolph","Vixen"]
+
+rollCall(["A","B","C"])
+["A","B","C"]
+```
+
+## Installing & Running
+
+Just `pnpm i` to install all dependencies and then `pnpm t` to run the tests!

src/2024/381-rollCall/rollCall.test.ts

@@ -0,0 +1,57 @@
+import { rollCall } from './rollCall';
+
+describe('#rollCall', () => {
+	it('should reverse names and sort them alphabetically', () => {
+		expect(rollCall(['yzneT', 'ydissaC', 'enimA'])).toStrictEqual(['Amine', 'Cassidy', 'Tenzy']);
+	});
+
+	it('should handle a list of all the reindeer names', () => {
+		expect(
+			rollCall([
+				'rennoD',
+				'nexiV',
+				'recnarP',
+				'temoC',
+				'neztilB',
+				'recnaD',
+				'dipuC',
+				'rehsaD',
+				'hploduR',
+			]),
+		).toStrictEqual([
+			'Blitzen',
+			'Comet',
+			'Cupid',
+			'Dancer',
+			'Dasher',
+			'Donner',
+			'Prancer',
+			'Rudolph',
+			'Vixen',
+		]);
+	});
+
+	it('should handle single-letter names without any change', () => {
+		expect(rollCall(['A', 'B', 'C'])).toStrictEqual(['A', 'B', 'C']);
+	});
+
+	it('should handle an empty list gracefully', () => {
+		expect(rollCall([])).toStrictEqual([]);
+	});
+
+	it('should handle a single name correctly', () => {
+		expect(rollCall(['adniL'])).toStrictEqual(['Linda']);
+	});
+
+	it('should handle names with mixed cases correctly', () => {
+		expect(rollCall(['AIz', 'aRiD', 'eMmA'])).toStrictEqual(['AmMe', 'DiRa', 'zIA']);
+	});
+
+	it('should handle duplicate reversed names and sort them properly', () => {
+		expect(rollCall(['adnaL', 'adnaL'])).toStrictEqual(['Landa', 'Landa']);
+	});
+
+	it('should handle names that are palindromes (no visible change after reversing)', () => {
+		expect(rollCall(['anna', 'bob', 'otto'])).toStrictEqual(['anna', 'bob', 'otto']);
+	});
+});

src/2024/381-rollCall/rollCall.ts

@@ -0,0 +1,22 @@
+/*
+Santa is conducting his daily roll call for the reindeer,
+but the printer has mistakenly printed all their names backwards.
+To take attendance properly,
+he urgently needs a tool to reverse the reindeer names and put them in alphabetical order!
+Can you help Santa?
+
+Example:
+
+rollCall(["yzneT","ydissaC","enimA"])
+["Amine","Cassidy","Tenzy"]
+
+rollCall(["rennuD","nexiV","recnarP","temoC","neztilB","recnaD","diduC","rehsaD","hploduR"])
+["Blitzen","Comet","Cupid","Dancer","Dasher","Donner","Prancer","Rudolph","Vixen"]
+
+rollCall(["A","B","C"])
+["A","B","C"]
+*/
+
+export function rollCall(names: string[]): string[] {
+	return names.map(name => name.split('').reverse().join('')).sort();
+}