antonio081014

class AsyncFileReading {
    func asyncReadFile(_ url: URL) async throws -> Data {
        let (data, _) = try await URLSession.shared.data(from: url)
        return data
    }
    
    static func testout() {
        let instance = AsyncFileReading()
        let filename = "file_to_be_read.txt"
        let url = Bundle.main.bundleURL.appending(component: filename)

antonio081014

func load(from url: URL, completion: @escaping (Result<Data, Error>) -> Void) {
    DispatchQueue.global().async {
        do {
            let data = try Data(contentsOf: url)
            DispatchQueue.main.async {
                completion(.success(data))
            }
        } catch {
            DispatchQueue.main.async {
                completion(.failure(error))

antonio081014

import Foundation
import Combine

class FileSubscription<S: Subscriber>: Subscription
    where S.Input == Data, S.Failure == Error {

    // fileURL is the url of the file to read
    private let fileURL: URL
    private var subscriber: S?

antonio081014

import UIKit

extension UIView {
    public var isShimmering: Bool {
        get {
            return layer.mask?.animation(forKey: shimmerAnimationKey) != nil
        }
        set {
            if newValue {
                startShimmering()

antonio081014

func test_imageEntity_properties() throws {
    // Assert non nil value, and unwrap it.
    let entity = try XCTUnwrap(
        CoreDataStore.model?.entitiesByName["Name of Entity"]
    )

    entity.verify(attribute: "id", hasType: .UUIDAttributeType, isOptional: false)
    entity.verify(attribute: "description", hasType: .stringAttributeType, isOptional: true)
    entity.verify(attribute: "url", hasType: .URIAttributeType, isOptional: false)
}

antonio081014

import XCTest

extension XCTestCase {
    func trackForMemoryLeaks(_ instance: AnyObject, file: StaticString = #file, line: UInt = #line) {
        addTeardownBlock { [weak instance] in
            XCTAssertNil(instance, "Instance should have been deallocated. Potential memory leak.", file: file, line: line)
        }
    }
}
// Here is how to call this function.

antonio081014

//
//  ScrollViewController.swift
//
//  Created by Antonio081014 on 3/6/18.
//  Copyright © 2018 sample.com. All rights reserved.
//

import UIKit

antonio081014

import Foundation

struct Country {
    let name: String
    let capital: String
    var visited: Bool
}

extension Country: Equatable {
    static func == (lhs: Country, rhs: Country) -> Bool {

antonio081014

This is a simple OptionSet Demo written in swift.

import UIKit

struct Weekday: OptionSet, CustomStringConvertible {
    let rawValue: Int
    
    /// Monday
    static let Monday = Weekday(rawValue: 1 << 2)

antonio081014

//: Playground - noun: a place where people can play

import UIKit

var str = "Hello, playground" {
    //"Hello, playground"
    willSet {
        print("willSet \(str) : \(newValue)")
        // "willSet Hello, playground : Hello, Antonio.\n"
        str = "Hi"