Update to Day Four: Try using the parjs library to parse the input, instead of Regex

src/day_four.ts

@@ -1,6 +1,18 @@
 import fs from "fs";
-import {Engine} from "./day_three";
-import {forEach} from "lodash";
+import {whitespace, int, string} from "parjs";
+import {between, manySepBy, then} from "parjs/combinators";
+
+const cardIdParser = int()
+	.pipe(between(whitespace()))
+	.pipe(between(string('Card'), string(': ')));
+
+const numbersParser = int()
+	.pipe(between(whitespace()))
+	.pipe(manySepBy(whitespace()));
+
+const winningNumberParser = numbersParser
+	.pipe(between(cardIdParser, string('|')))
+	.pipe(then(numbersParser));
 
 export class Scratchcard {
 	private readonly numbers: number[];
@@ -8,11 +20,13 @@ export class Scratchcard {
 	private children: Scratchcard[] = [];
 
 	constructor(input: string) {
-		const [_, withoutId] = input.split(':');
-		const [winning, ourNumbers] = withoutId.split('|');
+		const [
+			winningNumbers,
+			numbers
+		] = winningNumberParser.parse(input).value;
 
-		this.winningNumbers = this.parseNumberList(winning);
-		this.numbers = this.parseNumberList(ourNumbers);
+		this.winningNumbers = winningNumbers;
+		this.numbers = numbers;
 	}
 
 	private parseNumberList(input: string): number[] {