st-small

let tokenParts = deviceToken.map { data -> String in
            return String(format: "%02.2hhx", data)
        }
        let token = tokenParts.joined()
        print("Device Token: \(token)")

st-small

func sendToSlack() {
        
        let slackUrl = ""
        
        guard let url = URL(string: slackUrl) else {
            print("Error: cannot create URL")
            return
        }
        
        guard let position = lastPosition else {

st-small

protocol Payable {
    func calculateWages() -> Int
}

extension Payable {
    func calculateWages() -> Int {
        return 10000
    }
}

st-small

import UIKit
// *********************************
// ************** MAP **************
// *********************************
// Классический вариант
func lengthOf(strings: [String]) -> [Int] {
    
    var result = [Int]()
    
    for string in strings {

st-small

private func randomColor() -> UIColor {
        return UIColor(red: CGFloat(arc4random()) / CGFloat(UInt32.max), 
                       green: CGFloat(arc4random()) / CGFloat(UInt32.max), 
                       blue: CGFloat(arc4random()) / CGFloat(UInt32.max), 
                       alpha: 1.0)
    }

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import UIKit

public class Human: NSObject {
    
    @objc dynamic public var firstName = "*****"
    @objc dynamic public var lastName = "*****"
    @objc dynamic public var age = 0
    @objc dynamic public var hobby = "*****"
    @objc dynamic public var university = "*****"
    @objc dynamic public var sportLeague = "*****"

st-small

    func checkPhoneNumber(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

        let validationSet = NSCharacterSet.decimalDigits.inverted
        let components = string.components(separatedBy: validationSet)

        guard components.count == 1 else { return false }

        guard var newString = (textField.text as NSString?)?.replacingCharacters(in: range, with: string) else { return false }

        let validComponents = newString.components(separatedBy: validationSet)

st-small

list = [9, 6, 7, 3, 42, 2, 78, 4, 5, 67, 98, 1]

func quickSort2 <T: Comparable> (_ list: [T]) -> [T] {
    
    if list.count == 0 {
        return []
    }
    
    let pivot = list[0]
    let sublist = list.count > 1 ? list[1..<list.count] : []