made it though day04

2022/day03/main.mjs

@@ -13,8 +13,8 @@ let group = []
 
 rl.on('line', line => {
   let inventory = [
-    line.substr(0, line.length/2),
-    line.substr(line.length/2)
+    line.substring(0, line.length/2),
+    line.substring(line.length/2)
   ]
   let dublicate = ""
   inventory0Loop:

2022/day04/input.test

@@ -0,0 +1,6 @@
+2-4,6-8
+2-3,4-5
+5-7,7-9
+2-8,3-7
+6-6,4-6
+2-6,4-8

2022/day04/main.mjs

@@ -0,0 +1,48 @@
+import fs from 'node:fs'
+import readline from 'node:readline'
+
+const rl = readline.createInterface({
+	input: fs.createReadStream('input'),
+	output: process.stdout,
+	terminal: false
+})
+
+let groupcount = 0
+let linecount = 0
+let overlapcount = 0
+rl.on('line', line => {
+	let containsRange = []
+	let overlapRange = []
+	let groups = line.split(',').map(value => value.split('-'))
+	let group0Range = range(groups[0][0], groups[0][1])
+	let group1Range = range(groups[1][0], groups[1][1])
+	containsRange = [
+		group0Range.every(elem => group1Range.includes(elem)),
+		group1Range.every(elem => group0Range.includes(elem)),
+	]
+	if (containsRange[0] || containsRange[1]) {
+		groupcount++
+	}
+	overlapRange = [
+		group0Range.some(elem => group1Range.includes(elem)),
+		group1Range.some(elem => group0Range.includes(elem)),
+	]
+	if (overlapRange[0] || overlapRange[1]) {
+		overlapcount++
+	}
+	linecount++
+})
+
+rl.on('close', () => {
+	console.log(`${groupcount} groups fully contain each other`)
+	console.log(`${overlapcount} groups overlap each other`)
+	console.log(`There are ${linecount} groups in general`)
+})
+
+function range(start = 0, end = 0) {
+	let rangeArray = []
+	for(let i = parseInt(start); i <= end; i++) {
+		rangeArray.push(i)
+	}
+	return rangeArray
+}