04.js

/* eslint-disable unicorn/prevent-abbreviations */
import path from 'node:path';
import {fileURLToPath} from 'node:url';
import {readInput} from '../../../util.js';

const directoryPath = path.dirname(fileURLToPath(import.meta.url));
const fileContent = await readInput(directoryPath);
const pairs = fileContent
	.split('\n')
	.filter(line => line !== '')
	.map(pair =>
		pair.split(',').map(sections => sections.split('-').map(Number)),
	);
const fullyContainingAssignmentPairs = pairs.filter(
	pair =>
		(pair[0][0] >= pair[1][0] && pair[0][1] <= pair[1][1]) ||
		(pair[0][0] <= pair[1][0] && pair[0][1] >= pair[1][1]),
).length;

console.log(
	'Fully containing assignment pairs:',
	fullyContainingAssignmentPairs,
);

function rangeToArray(range) {
	const array = [];

	for (let i = range[0]; i <= range[1]; i++) {
		array.push(i);
	}

	return array;
}

const partlyContainingAssignmentPairs = pairs.filter(pair => {
	const firstRange = rangeToArray(pair[0]);
	const secondRange = rangeToArray(pair[1]);
	return (
		firstRange.find(item => secondRange.includes(item)) ||
		secondRange.find(item => firstRange.includes(item))
	);
}).length;
console.log(
	'Partly containing assignment pairs:',
	partlyContainingAssignmentPairs,
);