rommex

private func fetchData()  -> Promise<[Int]> {
        return Promise { seal in
            let someData = (1...100_000).map { _ in Int.random(in: (1...100)) }
            seal.fulfill(someData)
        }
    }
    
    private func calculateMinMax(forData array: [Int]) -> Promise<(Int, Int)> {
        return Promise { seal in
            guard let first = array.first else {