day 3 (refactor)

day-3/day3.ts

@@ -3,16 +3,16 @@ import * as R from "remeda";
 const regex = new RegExp(/mul\((\d{1,3},\d{1,3}?)\)/g);
 
 export function day3(input: string) {
-	const matches = input.matchAll(regex);
+	return R.sum(
-	const numberPairs = [];
+		input
-	for (const match of matches) {
+			.matchAll(regex)
-		numberPairs.push(match[1].split(",").map((v) => Number.parseInt(v, 10)));
+			.map((match) => {
-	}
+				// match[1] looks like "2,4"
-	return R.pipe(
+				const [a, b] = match[1].split(",").map((v) => Number.parseInt(v, 10));
-		numberPairs,
+				return a * b;
-		R.map(([a, b]) => a * b),
+			})
-		R.sum,
+			.toArray(),
-	) as unknown as number;
+	);
 }
 
 export function day3part2(input: string) {