Did part 1 of day 1 2023

2023/Day 1/part1.js

@@ -0,0 +1,27 @@
+#!/usr/bin/env node
+
+
+var inputstring = require('fs').readFileSync('input.txt','utf8');
+
+var lines = inputstring.split('\n').filter(i=>i);
+var minNumerical = '0'.charCodeAt(0);
+var maxNumerical = '9'.charCodeAt(0);
+
+function onlynumerical(str) {
+ return str.split('').map(i=>i.charCodeAt(0)).filter(i=>(i>=minNumerical && i<=maxNumerical)).map(i=>i-48);
+}
+function firstandlast(arr) {
+ return [arr[0],arr[arr.length-1]];
+}
+var nums = lines.map(i=>{
+ var nums = firstandlast(onlynumerical(i));
+ //console.log({nums});
+ return nums[0]*10+nums[1];
+});
+//console.log({nums});
+
+var sum=0;
+for(var i of nums) {
+ sum+=i;
+}
+console.log(sum);