Array+Extension.swift

public extension Array where Array.Element == UInt8 {
    func getString(atIndex: Int, count: Int) -> String? {
        guard let bytes = self.slice(atIndex, count: count) else { return nil }
        guard let string = String(bytes: bytes, encoding: .utf8)?.trim() else { return nil }
        return string
    }

    func getInt(atIndex: Int, count: Int) -> Int? {
        guard let bytes = self.slice(atIndex, count: count) else { return nil }
        let int = bytes.withAlignedBytes {$0.load(as: UInt16.self)}
        return Int(int)
    }

    func getDouble(atIndex: Int, count: Int) -> Double? {
        guard let bytes = self.slice(atIndex, count: count) else { return nil }
        let double = bytes.withAlignedBytes {$0.load(as: Double.self)}
        return double
    }

    func getDecimal(atIndex: Int, count: Int) -> Decimal? {
        guard let bytes = self.slice(atIndex, count: count) else { return nil }
        let decimal = bytes.withAlignedBytes {$0.load(as: Decimal.self)}
        return decimal
    }
}