aydin-emre

import UIKit

public class TreeNode<T> {
    
    public var value: T
    public var children: [TreeNode] = []
    
    public init(_ value: T) {
        self.value = value
    }

aydin-emre

import UIKit

public protocol Queue {
    associatedtype Element
    mutating func enqueue(_ element: Element)
    mutating func dequeue() -> Element?
    var isEmpty: Bool { get }
    var peek: Element? { get }
}

aydin-emre

import UIKit

public class Node<Value> {

    public var value: Value
    public var next: Node?

    public init(value: Value, next: Node? = nil) {
        self.value = value
        self.next = next

aydin-emre

import UIKit

public struct Stack<Element> {

    private var storage: [Element] = []

    public init() { }

    public init(_ elements: [Element]) {
        storage = elements

aydin-emre

let file_der = Bundle(for: type(of: self)).path(forResource: "easmart", ofType: "der")
let localCertificate = NSData(contentsOfFile: file_der!)!

let serverTrustPolicy = ServerTrustPolicy.pinCertificates(
    certificates : [SecCertificateCreateWithData(nil, localCertificate)!],
    validateCertificateChain : true,
    validateHost : true
)

let serverTrustPolicies = ["easmart.co": serverTrustPolicy]

aydin-emre

class NSURLSessionPinningDelegate: NSObject, URLSessionDelegate {

    func urlSession(_ session: URLSession, didReceive challenge: URLAuthenticationChallenge, completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
        if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust {
            if let serverTrust = challenge.protectionSpace.serverTrust {
                if #available(iOS 12.0, *) {
                    let isServerTrusted = SecTrustEvaluateWithError(serverTrust, nil)

                    if(isServerTrusted) {
                        if let serverCertificate = SecTrustGetCertificateAtIndex(serverTrust, 0) {

aydin-emre

session = URLSession(configuration: .default,
                                     delegate: NSURLSessionPinningDelegate(),
                                     delegateQueue: nil)

aydin-emre

session = URLSession.shared

aydin-emre

import Combine

enum MyError: Error {
    case subscriberError
}

class StringSubscriber: Subscriber {
    
    func receive(subscription: Subscription) {
        subscription.request(.max(2))

aydin-emre

class StringSubscriber: Subscriber {
    
    func receive(subscription: Subscription) {
        print("Received: Subscription")
        subscription.request(.max(23)) // backpressure
    }
    
    func receive(_ input: String) -> Subscribers.Demand {
        print("Received: Value", input)
        return .unlimited