pardel

func isValidIPv4(_ ip: String) -> Bool {
    return ip
        .characters.split(separator: ".").map { String($0) }
        .flatMap { Int($0) }
        .filter { (0...255).contains($0) }
        .count == 4
}

pardel

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

import UIKit

class AView: UIView {
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        customInitialisation()
    }

pardel

//
// MyAppAccount
//

struct MyAppAccount {
    
    let latch = Latch(service: (NSBundle.mainBundle().bundleIdentifier ?? "com.example.MyApp"))
    
    
    var username: String? {

pardel

//
//  AlertView.swift
//

import UIKit


// holding array so the AlertView objects don't go out of scope
internal var alerts = [AlertView]()

pardel

extension NSUUID {
    var toString: String {
        return self.UUIDString
    }
}


let uuid = NSUUID().toString

pardel

Sep 16 05:13:57 i5s SpringBoard[48] <Warning>: Received memory warning.
Sep 16 05:13:57 i5s discoveryd[50] <Notice>: Basic DeviceInformation Memory Pressure Warning sent: pressure
Sep 16 05:13:57 i5s MobileMail[1305] <Warning>: Received memory warning.
Sep 16 05:13:57 i5s MobilePhone[1176] <Warning>: Received memory warning.
Sep 16 05:13:57 i5s MobileSMS[316] <Warning>: Received memory warning.
Sep 16 05:13:57 i5s InCallService[163] <Warning>: Received memory warning.
Sep 16 05:13:57 i5s syncdefaultsd[1848] <Notice>: (Warn ) received memory warning
...
Sep 16 05:14:20 i5s Kindle[1827] <Warning>: Received memory warning.
...

pardel

var error: NSError? = nil
if self.managedObjectContext?.save(&error) == true {
  return
}
NSLog("Unresolved error \(error), \(error!.userInfo)")

pardel

    func saveContext () {
        return if self.managedObjectContext == nil
        return if self.managedObjectContext?.hasChanges == false
        
        var error: NSError? = nil
        return if self.managedObjectContext?.save(&error) == true
        
        NSLog("Unresolved error \(error), \(error!.userInfo)")
        abort()
    }