refactor

Author: shahata

src/2025/day02.js

@@ -1,27 +1,21 @@
-export function part1(input) {
+function invalidSum(input, regex) {
   let ranges = input.split(",").map(range => range.split("-").map(Number));
   let sum = 0;
   for (let range of ranges) {
     for (let i = range[0]; i <= range[1]; i++) {
       let str = i.toString();
-      if (str.match(/^(\d+)\1$/)) {
+      if (str.match(regex)) {
         sum += i;
       }
     }
   }
   return sum;
 }
 
+export function part1(input) {
+  return invalidSum(input, /^(\d+)\1$/);
+}
+
 export function part2(input) {
-  let ranges = input.split(",").map(range => range.split("-").map(Number));
-  let sum = 0;
-  for (let range of ranges) {
-    for (let i = range[0]; i <= range[1]; i++) {
-      let str = i.toString();
-      if (str.match(/^(\d+)\1+$/)) {
-        sum += i;
-      }
-    }
-  }
-  return sum;
+  return invalidSum(input, /^(\d+)\1+$/);
 }