feat(pkg): Add core extensions package

packages/core-extensions/src/object/map.ts

@@ -0,0 +1,21 @@
+declare global {
+	interface Object {
+		map<T, U>(
+			this: Record<string, T>,
+			callback: (value: T, key: string, obj: Record<string, T>) => U
+		): Record<string, U>
+	}
+}
+
+Object.prototype.map = function <T, U>(
+	this: Record<string, T>,
+	callback: (value: T, key: string, obj: Record<string, T>) => U
+): Record<string, U> {
+	const result: Record<string, U> = {}
+	for (const [key, value] of Object.entries(this)) {
+		result[key] = callback(value, key, this)
+	}
+	return result
+}
+
+export {}