SergLam

import UIKit
import PlaygroundSupport

let page = PlaygroundPage.current
page.needsIndefiniteExecution = true

func palindrome(for string: String) -> Bool {
    let arr = Array(string.lowercased())
    
    // NOTE: from the natural language point of view empty string - is not a palindrome

SergLam

import UIKit

extension UIApplication {
    
    // MARK: Public
    func isRunningInTestFlightEnvironment() -> Bool {
        if isSimulator() {
            return false
        } else {
            if isAppStoreReceiptSandbox() && !hasEmbeddedMobileProvision() {

SergLam

[
    {"locale_key": "bs", "Marathi": "Bosnian",
        "capital": {
            "name": "New Delhi",
            "latitude": 28.6357600,
            "longitude": 77.2244500
        }
    },
    {"locale_key": "ee_TG", "Marathi": "Ewe (Togo)",
        "capital": {

SergLam

import CoreData
import Foundation

// NOTE: use manual / none code generation - 
// it give full controll over models properties(custom getters + setters) + model lifecycle

// To create a new model class:
// 1. Focus on core data model class
// 2. XCode -> Editor -> Create NSManagedObject Subclass
// 3. Select an appropriate model from database scheme and create a class

SergLam

import CoreData
import Foundation

extension CoreDataManager {

    /**
    User profile (id, email, phone, picture_url, social links and ect.)
    */
    var myProfileSettings: MyProfileSettings? {
        get {

SergLam

import UIKit

extension UITableView {

    func isCellVisible(section: Int, row: Int) -> Bool {
        guard let indexes = self.indexPathsForVisibleRows else {
            return false
        }
        return indexes.contains{ $0.section == section && $0.row == row }
    }

SergLam

import Foundation
import Moya

typealias DataUpdateInfo = [AnyHashable: [String: Any]]

protocol JSONAble where Self: Codable {
    
    func toJSON() -> [String: Any]
    static func fromJSON(_ dictionary: [AnyHashable: Any]) -> Self?
    func toMultipartData() -> [Moya.MultipartFormData]?

SergLam

import Foundation
import Rswift // pod 'R.swift'

typealias Localizable = R.string.localizable

// NOTE: Contains accesibility identifiers (XCUITest) + accesibility labels (Voice over support)
struct Accessibility {
  
  // MARK: Chat navigation bar
    static let chatNavigationUserProfileImageId = "ChatNavigationBar.chatOpponentAvatar"

SergLam

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        
        var testStr = ""
        var testStr2 = "131231"
        
        testStr.test = 20

SergLam

http://www.sql-ex.ru/learn_exercises.php

Description

The firm owns several buy-back centers for collection of recyclable materials. Each of them receives funds to be paid to the recyclables suppliers. Data on funds received is recorded in the table
Income_o(point, date, inc)
The primary key is (point, date), where point holds the identifier of the buy-back center, and date corresponds to the calendar date the funds were received. The date column doesn’t include the time part, thus, money (inc) arrives no more than once a day for each center. Information on payments to the recyclables suppliers is held in the table
Outcome_o(point, date, out)
In this table, the primary key (point, date) ensures each buy-back center reports about payments (out) no more than once a day, too.
For the case income and expenditure may occur more than once a day, another database schema with tables having a primary key consisting of the single column code is used: