Solve 2025-12, lol

2025-12-12 08:57:17 +01:00
parent 3e3806c1b9
commit c664361b18
5 changed files with 82 additions and 2 deletions
@@ -14,9 +14,9 @@ export function sumArray(arr: ReadonlyArray<number>): number {
 */
 export function sumBy<E>(
  arr: ReadonlyArray<E>,
-  by: (element: E) => number | string
+  by: (element: E, index: number) => number | string
 ): number {
-  return arr.reduce((sum, element) => sum + Number(by(element)), 0);
+  return arr.reduce((sum, element, i) => sum + Number(by(element, i)), 0);
 }

 /**