Solve 2025-08

2025-12-08 14:09:00 +01:00
parent 63a7a93aba
commit 5421fde574
6 changed files with 119 additions and 1 deletions
@@ -135,6 +135,13 @@ export function uniqueCombinations<E>(arr: ReadonlyArray<E>): { a: E; b: E }[] {
    arr.flatMap((b, bI) => (a !== b && aI > bI ? [{ a, b }] : []))
  );
 }
+export function uniqueIndexCombinations<E>(
+  arr: ReadonlyArray<E>
+): { aI: number; bI: number }[] {
+  return arr.flatMap((a, aI) =>
+    arr.flatMap((b, bI) => (a !== b && aI > bI ? [{ aI, bI }] : []))
+  );
+}

 /**
 * Returns a filter lambda to be used in array.filter() to only allow the