From dabf97809644c000063e3774afc049114b782a16 Mon Sep 17 00:00:00 2001
From: "T. R. Bernstein" <137705289+trbernstein@users.noreply.github.com>
Date: Fri, 4 Jul 2025 00:23:42 +0200
Subject: [PATCH] feat(core-extensions): Narrow type of array in mapKeys

---
 .../src/internal/mapped-keys.type.ts              | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/packages/core-extensions/src/internal/mapped-keys.type.ts b/packages/core-extensions/src/internal/mapped-keys.type.ts
index aca77e4..86091d4 100644
--- a/packages/core-extensions/src/internal/mapped-keys.type.ts
+++ b/packages/core-extensions/src/internal/mapped-keys.type.ts
@@ -1,8 +1,7 @@
-export type MappedKeys<T, R extends string> =
-	T extends Array<infer U>
-		? Array<MappedKeys<U, R>>
-		: T extends object
-			? {
-					[K in keyof T as R]: MappedKeys<T[K], R>
-				}
-			: T
+export type MappedKeys<T, R extends string> = T extends any[]
+	? { [K in keyof T]: MappedKeys<T[K], R> }
+	: T extends object
+		? {
+				[K in keyof T as R]: MappedKeys<T[K], R>
+			}
+		: T