cwagdev

func luhnCheck(number: String) -> Bool {
    var sum = 0
    let digitStrings = reverse(number).map { String($0) }
    
    for tuple in enumerate(digitStrings) {
        if let digit = tuple.element.toInt() {
            let odd = tuple.index % 2 == 1
            
            switch (odd, digit) {
            case (true, 9):

cwagdev

/// Describes a type of credit card for a subset of known types.
enum CreditCardType: Printable {
    case Amex, DinersClub, Discover, JCB, MasterCard, Visa, Unknown
    
    var description: String {
        switch self {
        case .Amex:
            return "Amex"
        case .DinersClub:
            return "Diners Club"

cwagdev

extension UIImage {
    convenience init!(color: UIColor, size: CGSize = CGSize(width: 1, height: 1)) {
        let rect = CGRect(x: 0, y: 0, width: size.width, height: size.height)
        UIGraphicsBeginImageContext(rect.size)
        let context = UIGraphicsGetCurrentContext()
        
        CGContextSetFillColorWithColor(context, color.CGColor)
        CGContextFillRect(context, rect)
        
        let image = UIGraphicsGetImageFromCurrentImageContext()

cwagdev

// Swift 2.2
let queue = dispatch_queue_create("myqueue", nil)
dispatch_async(queue) { 
  // do stuff
}
 
// Swift 3
let queue = DispatchQueue(label: "myqueue")
queue.async { 
  // do stuff

cwagdev

import UIKit
import CoreData

class BasicFetchedResultsControllerDelegate: NSObject, NSFetchedResultsControllerDelegate {
    let tableView: UITableView
    var controllerDidChangeContentCallback: (() -> Void)?
    
    /// The threshold for the number of inserts, deletes, and reloads to peform using animations. If the threshold is exceeded, the table will be reloaded using `reloadData()`. The default value is `50`.
    var numberOfRowOperationsThresholdBeforeFullReloadOccurs = 50
    

cwagdev

// Variables used by Scriptable.
// These must be at the very top of the file. Do not edit.
// icon-color: brown; icon-glyph: magic;
// Show a random MTG Card

const { transparent } = importModule('no-background')

let card = await randomCard()
let widget = await createWidget(card)

cwagdev

services:
  mc:
    image: itzg/minecraft-server
    tty: true
    stdin_open: true
    ports:
      - "25565:25565"
    environment:
      INIT_MEMORY: 1G
      MAX_MEMORY: 4G