array_comparable.swift

// MARK: - Comparable
extension User: Comparable {
    
    static func <(lhs: User, rhs: User) -> Bool {
        return lhs.name < rhs.name
    }
    
    static func ==(lhs: User, rhs: User) -> Bool {
        return lhs.name == rhs.name
    }
    
}

var receivedUsers = [User(name: "Maxim Vialyx"), User(name: "Dmitry Sokorin"), User(name: "Artem Hugarin")]
// receivedUsers -> [{name "Maxim Vialyx"}, {name "Dmitry Sokorin"}, {name "Artem Hugarin"}]
var sortedUsers = receivedUsers.sorted()
// sortedUsers -> [{name "Artem Hugarin"}, {name "Dmitry Sokorin"}, {name "Maxim Vialyx"}]

// TODO: OR you can mutate receivedUsers array
receivedUsers.sort()
// receivedUsers -> [{name "Artem Hugarin"}, {name "Dmitry Sokorin"}, {name "Maxim Vialyx"}]

let userIDs = [986, 176, 385, 564]
let minID = userIDs.min()
// 176
let maxID = userIDs.max()
// 986
let sortedIDs = userIDs.sorted()
// [176, 385, 564, 986]