INNER CODE UNIT · JavaScript

mapInGroups

pegaltier/awesome-utils-dev · utils-script/jsfunctions.js:34

const mapInGroups = (arr, iteratee, groupSize) => {
	const groups = groupBy(arr, (_v, i) => Math.floor(i / groupSize));

	return Object.values(groups)
		.reduce(async (memo, group) => [
			...(await memo),
			...(await Promise.all(group.map(iteratee)))
		], []);
};

const res = await mapInGroups(arr, async (v) => {
	console.log(`S ${v}`);
	await sleep(v);
	console.log(`F ${v}`);
	return v + 1;
}, 3);

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