day15 part 1 done

2023/day15/example.txt

@@ -0,0 +1 @@
+rn=1,cm-,qp=3,cm=2,qp-,pc=4,ot=9,ab=5,pc-,pc=6,ot=7

2023/day15/index.js

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+import fs from 'node:fs'
+
+function init(filename) {
+    const data = fs.readFileSync(filename, { encoding: 'utf-8' }, data => data)
+
+    const words = [...data.split(',')]
+    const result = words.map(word => hash(word))
+        .reduce((prev, cur) => prev + cur, 0)
+    console.log(result)
+}
+
+function hash(word) {
+
+    let result = 0
+    for (let i = 0; i < String(word).length; i++) {
+        result += word.charCodeAt(i)
+        result *= 17
+        result %= 256
+    }
+    return result
+}
+
+init('input.txt')