type-plus/ts/promise/mapSeries.ts

Provides additional types for TypeScript.

export function mapSeries<R, T = any>(values: T[], fn: (value: T) => Promise<R>): Promise<R[]> {
	return values.reduce((p, v) => p.then(r => fn(v).then(v => (r.push(v), r))), Promise.resolve<R[]>([]))
}