Add 2023/Day 1/part2.js

2023/Day 1/part2.js

@@ -0,0 +1,61 @@
+#!/usr/bin/env node
+
+var number_words=`
+0
+1
+2
+3
+4
+5
+6
+7
+8
+9
+zero
+one
+two
+three
+four
+five
+six
+seven
+eight
+nine`;
+number_words = number_words.split('\n').filter(i=>i);
+
+function allneedles(stack,needle) {
+ var out=[];
+ var sent=-1;
+ while((sent=stack.indexOf(needle,sent+1))!=-1) {
+  //console.log({stack,needle,sent});
+  out.push(sent);
+ }
+ return out;
+}
+
+function translatelineintopositions(line) {
+ var out = [];
+ number_words.forEach((needle,index)=>{
+  var valueof = index%10;
+  var allof = allneedles(line,needle);
+  //console.log({line,needle,valueof,allof});
+  out=out.concat(allof.map(pos=>({pos,valueof})));
+ });
+ out.sort((a,b)=>a.pos-b.pos);
+ return out;
+}
+
+function linetonumber(line) {
+ var numbers = translatelineintopositions(line);
+ var out =numbers[0].valueof*10+numbers[numbers.length-1].valueof;
+ console.log({out});
+ return out;
+}
+
+var inputstring = require('fs').readFileSync('input.txt','utf8');
+var lines = inputstring.split('\n').filter(i=>i);
+var sum=0;
+for(var line of lines) {
+ sum+=linetonumber(line);
+}
+console.log('Result:',sum);