DevAndArtist

import RxSwift
import RxCocoa
import RxRelay

extension Disposable {
  public func wrapIntoAnyDisposable() -> AnyDisposable {
    return AnyDisposable(self)
  }
}

DevAndArtist

Application Development Techniques

Drivable UI

@dynamicMemberLookup
struct DriverFor<Base> {
 var base: Base

DevAndArtist

Property Delegates

The original proposal: https://github.com/DougGregor/swift-evolution/blob/property-delegates/proposals/NNNN-property-delegates.md

---

What is proposed?

• A user can create custom property delegates that allow a var declaration to decide how to implement the storage.
• The original proposal want to use a new identifier space, prefixed by $, to uniquely identify a property delegate from the computed and non-prefixed main property.

DevAndArtist

public struct Unique<Key, Value>: Hashable where Key: Hashable {

  public enum KeyVariant {
    case key(Key)
    case keyPath(KeyPath<Value, Key>)
    case closure((Value) -> Key)

    internal func _key(for value: Value) -> Key {
      switch self {
      case .key(let key):

DevAndArtist

class Ref {
  weak var obj: Obj? {
    didSet { print("didSet", obj as Any) }
  }
}

class Obj {
  weak var ref: Ref?

  func unlink(from ref: Ref) {

DevAndArtist

public enum Foo : OptionSet {
	
	case a
	case b
	case value(UInt8)
	
	public var rawValue: UInt8 {
		
		switch self {
		case .a:

DevAndArtist

protocol ValueContainer {
  associatedtype Value
  var value: Value { get }
  init(_ value: Value)
}

extension ValueContainer where Self : Equatable, Value : Equatable {
  static func == (lhs: Self, rhs: Self) -> Bool {
    return lhs.value == rhs.value
  }

DevAndArtist

import RxSwift

public final class DisposeCache<Key>
  : ExpressibleByDictionaryLiteral where Key : Hashable {
  ///
  private var lock = NSRecursiveLock()

  ///
  private var storage: [Key: Disposable]

DevAndArtist

Path	Protocol
/swift/stdlib/public/core/AnyHashable.swift:16	_HasCustomAnyHashableRepresentation
/swift/stdlib/public/core/BidirectionalCollection.swift:21	_BidirectionalIndexable
/swift/stdlib/public/core/BridgeObjectiveC.swift:19	_ObjectiveCBridgeable
/swift/stdlib/public/core/Collection.swift:20	_IndexableBase
/swift/stdlib/public/core/Collection.swift:176	_Indexable
/swift/stdlib/public/core/CompilerProtocols.swift:193	_ExpressibleByBuiltinIntegerLiteral
/swift/stdlib/public/core/CompilerProtocols.swift:240	_ExpressibleByBuiltinFloatLiteral
/swift/stdlib/public/core/CompilerProtocols.swift:283	_ExpressibleByBuiltinBooleanLiteral

DevAndArtist

import UIKit

protocol ViewComponent : AnyObject {
  ///
  func isAncestor(of descendant: Self) -> Bool

  ///
  func isDescendant(of ancestor: Self) -> Bool