type ItemComparer<Item> = (a: Item, b: Item) => boolean;

/**
 * Shallow-ish array equality that checks length then each element. The
 * comparer defaults to reference equality, so scalar arrays compare by value
 * while object arrays compare by identity unless a custom comparer is
 * supplied.
 */
export function areArraysEqual<Item>(
	array1: ReadonlyArray<Item>,
	array2: ReadonlyArray<Item>,
	itemComparer: ItemComparer<Item> = (a, b) => a === b,
): boolean {
	return (
		array1.length === array2.length &&
		// biome-ignore lint/style/noNonNullAssertion: index < length guarantees defined
		array1.every((value, index) => itemComparer(value, array2[index]!))
	);
}