enumerate.ts

export function* enumerate<T>(
	iterable: Iterable<T>,
	start = 0,
): Generator<[number, T]> {
	let index = start;
	for (const value of iterable) {
		yield [index, value];
		index++;
	}
}

export async function* asyncEnumerate<T>(
	iterable: AsyncIterable<T> | Iterable<T>,
	start = 0,
): AsyncGenerator<[number, T]> {
	let index = start;
	for await (const value of iterable) {
		yield [index, value];
		index++;
	}
}