arturlector

Что такое назначенный инициализатор?

Назначенный инициализатор (designated initializer) - это главный инициализатор(конструктор), все остальные методы
создающие класс вызывают этот метод.

Как выглядит назначенный инициализатор?

IanKeen

enum TimePeriod {
    case Seconds(Int)
    case Minutes(Int)
    case Hours(Int)
    
    var timeInterval: NSTimeInterval {
        switch self {
        case .Seconds(let value): return NSTimeInterval(value)
        case .Minutes(let value): return NSTimeInterval(value * 60)
        case .Hours(let value): return NSTimeInterval(value * 60 * 60)

Thomvis

public extension Int {
    
    public var seconds: DispatchTimeInterval {
        return DispatchTimeInterval.seconds(self)
    }
    
    public var second: DispatchTimeInterval {
        return seconds
    }
    

pgherveou

import Foundation
import PlaygroundSupport
PlaygroundPage.current.needsIndefiniteExecution = true

/// define an operation success or error result
enum Result<T> {
  case error(Error)
  case success(T)
}

rondy

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

---

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

kitasuke

import UIKit

extension UITableView {
    func registerNib<T: UITableViewCell>(forCellType type: T.Type) {
        let name = String(describing: type)
        let nib = UINib(nibName: name, bundle: nil)
        register(nib, forCellReuseIdentifier: name)
    }
    
    func registerNib<T: UIView>(forHeaderFooterType type: T.Type) {

sauvikatinnofied

import Foundation
import UIKit

// Usage Examples
let shadowColor = Color.shadow.value
let shadowColorWithAlpha = Color.shadow.withAlpha(0.5)
let customColorWithAlpha = Color.custom(hexString: "#123edd", alpha: 0.25).value

enum Color {
    

sauvikatinnofied

import Foundation
import UIKit

// Usage Examples
let system12            = Font(.system, size: .standard(.h5)).instance
let robotoThin20        = Font(.installed(.RobotoThin), size: .standard(.h1)).instance
let robotoBlack14       = Font(.installed(.RobotoBlack), size: .standard(.h4)).instance
let helveticaLight13    = Font(.custom("Helvetica-Light"), size: .custom(13.0)).instance

struct Font {

kunikullaya

import Foundation

extension Date {

    func toString(format: String = "yyyy-MM-dd") -> String {
        let formatter = DateFormatter()
        formatter.dateStyle = .short
        formatter.dateFormat = format
        return formatter.string(from: self)
    }

karnlund

// This came from StackOverflow
// http://stackoverflow.com/questions/24857986/load-a-uiview-from-nib-in-swift
//
// https://gist.github.com/karnlund/b666acc88532d5f1ca591dd3580605cc

import UIKit

public extension UIView {
    public class func fromNib(_ nibName: String? = nil) -> Self? {
        return loadFromNib(nibName)