day 2

2024/2.1.ts

@@ -0,0 +1,30 @@
+import { open } from 'node:fs/promises';
+
+
+const file = await open('./2024/inputs/2');
+const all_diffs = []
+for await (const line of file.readLines()) {
+    const levelsMatch = line.matchAll(/\d+ ?/gm)
+    const levels = Array.from(levelsMatch).map(e => Number(e[0]))
+    let previous = levels.shift()!
+    all_diffs.push(levels.map((e) => {
+        const value = e - previous
+        previous = e
+        return value
+    }))
+
+}
+const result = all_diffs.reduce((prev, line, index) => {
+    if (line.some(e => e == 0)) {
+        return prev
+    }
+    if (!line.every(e => e < 0) && !line.every(e => e > 0)) {
+        return prev
+    }
+    if (!line.every(e => Math.abs(e) >= 1 && Math.abs(e) <= 3)) {
+        return prev
+    }
+    return prev + 1
+}, 0)
+console.log(result)
+all_diffs