robertmryan

//
//  LocationsManager.swift
//  MyApp
//
//  Created by Robert Ryan on 12/24/22.
//

import Foundation
import CoreLocation

robertmryan

class ViewController: UIViewController {
    @IBOutlet var label: UILabel!

    private weak var timer: Timer?
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        
        startTimer()
    }

robertmryan

func benchmark() {
    let string = String(repeating: "This is it. ", count: 10000)
    let i1 = 19000
    let i2 = 19020

    // time computation
    func tc(computation: (Int, Int) -> Void) {
        let startTime = DispatchTime.now()
        for i in 0..<100 {
            computation(i1 + i, i2 + i)

robertmryan

func search() async throws -> BusinessSearchResult {
    var components = URLComponents(string: "https://api.yelp.com/v3/businesses/search")

    components?.queryItems = [
        URLQueryItem(name: "term", value: "theater"),
        URLQueryItem(name: "location", value: "NYC")
    ]

    guard let url = components?.url else { throw URLError(.badURL) }

robertmryan

class NetworkManager {
    let session: URLSession ＝ {
        let session = URLSession(configuration: .default)
        return session
    }()
    
    deinit {
        session.finishTasksAndInvalidate()
    }
    

robertmryan

func foo(threads: Int) {
    print("starting \(threads) threads")
    
    let semaphore = DispatchSemaphore(value: 0)
    let group = DispatchGroup()
    
    for i in 0 ..< threads {
        DispatchQueue.global().async(group: group) {
            semaphore.wait()
            print("done waiting \(i)")

robertmryan

import UIKit
import os.log

private let logger = Logger(subsystem: "MyApp", category: "ViewController")

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

robertmryan

var task: Task<Void, Error>?

func updateLabelAfterAPICall(initialValue: String) {
    task?.cancel() // just in case
    
    task = Task { [weak self] in
        try await Task.sleep(nanoseconds: 5_500_000_000)
        self?.label.text = "New Value after 5.5 seconds passed"
    }
}

robertmryan

class ViewController: UIViewController {
    lazy var animator = UIDynamicAnimator(referenceView: view)

    override func viewDidLoad() {
        super.viewDidLoad()

        let animatedView = UIView(frame: CGRect(x: 120, y: 100, width: 50, height: 50))
        animatedView.transform = CGAffineTransform(rotationAngle: .pi / 4)
        animatedView.backgroundColor = .blue

robertmryan

struct HoundResponse<T: Decodable>: Decodable {
    var message: T?
    var status: String
}

let url = URL(string: "https://dog.ceo/api/breed/hound/images")!
URLSession.shared.dataTask(with: url) { data, _, error in
    guard let data = data, error == nil else {
        print(error ?? URLError(.badServerResponse))
        return