erikolsson

import Foundation
import RxSwift

extension ObservableType where E == Bool {
  
  func negate() -> Observable<Bool> {
    return map(!)
  }

}

erikolsson

extension SharedModel {

  class func decode(data: Data) -> SharedModel? {
    NSKeyedUnarchiver.setClass(SharedModel.self, forClassName: "SharedModel")
    return NSKeyedUnarchiver.unarchiveObject(with: data) as? SharedModel
  }

  func encode() -> Data {
    NSKeyedArchiver.setClassName("SharedModel", for: SharedModel.self)
    return NSKeyedArchiver.archivedData(withRootObject: self)

erikolsson

import UIKit

indirect enum Tree<Element : Comparable> {
  case Empty
  case Node(Element, Tree<Element>, Tree<Element>)

  init() {
    self = .Empty
  }