question: separateAndSort

README.md

@@ -91,6 +91,7 @@ I started this in the [issue #176](https://buttondown.email/cassidoo/archive/we-
 - [314 - guessingGame](src/2023/314-guessingGame)
 - [315 - countAndSay](src/2023/315-countAndSay)
 - [316 - minSubs](src/2023/316-minSubs)
+- [317 - separateAndSort](src/2023/317-separateAndSort)
 - [318 - buildStaircase](src/2023/318-buildStaircase)
 </details>
 

src/2023/317-separateAndSort/README.md

@@ -0,0 +1,21 @@
+# separateAndSort
+
+Interview question of the [issue #317 of rendezvous with cassidoo](https://buttondown.email/cassidoo/archive/people-who-think-they-know-everything-are-a-great/).
+
+## The Question
+
+**Given an array of integers, sort them into two separate sorted arrays of even and odd numbers.** If you see a zero, skip it.
+
+Example:
+
+```js
+> separateAndSort([4,3,2,1,5,7,8,9])
+> [[2,4,6], [1,3,5,7,9]]
+
+> separateAndSort([1,1,1,1])
+> [[], [1,1,1,1]]
+```
+
+## Installing & Running
+
+Just `pnpm i` to install all dependencies and then `pnpm t` to run the tests!

src/2023/317-separateAndSort/separateAndSort.test.ts

@@ -0,0 +1,33 @@
+import { separateAndSort } from './separateAndSort';
+
+describe('#separateAndSort', () => {
+	it('should separate and sort even and odd numbers', () => {
+		expect(separateAndSort([4, 3, 2, 1, 5, 7, 8, 9])).toStrictEqual([
+			[2, 4, 8],
+			[1, 3, 5, 7, 9],
+		]);
+	});
+
+	it('should handle an array with all even numbers', () => {
+		expect(separateAndSort([2, 4, 6, 8, 10])).toStrictEqual([[2, 4, 6, 8, 10], []]);
+	});
+
+	it('should handle an array with all odd numbers', () => {
+		expect(separateAndSort([1, 3, 5, 7, 9])).toStrictEqual([[], [1, 3, 5, 7, 9]]);
+	});
+
+	it('should handle an empty array', () => {
+		expect(separateAndSort([])).toStrictEqual([[], []]);
+	});
+
+	it('should handle an array with zeros and negative numbers', () => {
+		expect(separateAndSort([0, -2, 4, -6, 0, 3, 5, 7, 9])).toStrictEqual([
+			[-6, -2, 4],
+			[3, 5, 7, 9],
+		]);
+	});
+
+	it('should handle an array with only zeros', () => {
+		expect(separateAndSort([0, 0, 0])).toStrictEqual([[], []]);
+	});
+});

src/2023/317-separateAndSort/separateAndSort.ts

@@ -0,0 +1,31 @@
+/*
+Given an array of integers, sort them into two separate sorted arrays of even and odd numbers.
+If you see a zero, skip it.
+
+Example:
+
+> separateAndSort([4,3,2,1,5,7,8,9])
+> [[2,4,6], [1,3,5,7,9]]
+
+> separateAndSort([1,1,1,1])
+> [[], [1,1,1,1]]
+*/
+
+type EvensAndOdds = [number[], number[]];
+
+export function separateAndSort(integers: number[]): EvensAndOdds {
+	return integers
+		.filter(Boolean)
+		.sort((a, b) => a - b)
+		.reduce<EvensAndOdds>(
+			([evens, odds], number) => {
+				if (number % 2 === 0) {
+					evens.push(number);
+				} else {
+					odds.push(number);
+				}
+				return [evens, odds];
+			},
+			[[], []],
+		);
+}