ukitaka

textField.rx_text
    .map(myMethod) // selfが強参照される → リークする
    .subscribeNext { _ in }
    .addDisposableTo(disposeBag)

textField.rx_text
    .map { [unowned self] in self.myMethod($0) } // 長いけどこう書くしかない
    .subscribeNext { _ in }
    .addDisposableTo(disposeBag)

ukitaka

protocol OptionalType {
    associatedtype Wrapped
    func map<U>(@noescape f: (Wrapped) throws -> U) rethrows -> U?
}

extension Optional: OptionalType {
    
}

extension ObservableType where E: OptionalType {

ukitaka

func const<A, B>(a: A) -> B -> A {
  return { _ in a }
}

ukitaka

// 1. インターフェースをつくる
protocol UserRepository {
    func findByID(userID: UserID) -> User
}

// 2. 実装を作る
class UserDAO: UserRepository {
    
    init() { ... }

ukitaka

public protocol Entity: Equatable {
    associatedtype ID: Equatable
    var id: ID { get }
}

public func ==<E: Entity>(lhs: E, rhs: E) -> Bool {
    return lhs.id == rhs.id
}

ukitaka

@_exported import class Swinject.Container

public struct DIContainer {
    public static let container = Container()
    
    private init() { }
    
    public static func regist(@noescape block: Container -> Void) {
        container.removeAll()
        block(container)

ukitaka

import RealmSwift

private let RealmSchemaVersion: UInt64 = 1
private let DefaultInMemoryRealmIndentifier = "..............."

private func realmfileURL(fileName: String, bundleIdentifier: String) -> NSURL? {
    #if os(tvOS)
        let path: NSString? = NSSearchPathForDirectoriesInDomains(.CachesDirectory, .UserDomainMask, true).first
    #elseif os(iOS)
        let path: NSString? = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).first

ukitaka

@_exported import class BrightFutures.Future
import func BrightFutures.future
import var BrightFutures.ImmediateOnMainExecutionContext
import RealmSwift

protocol RepositoryImplType {
    func runWrite(f: (Realm) throws -> Void) -> Future<Void, RepositoryError>
    func runRead<T>(f: (Realm) throws -> T) -> Future<T, RepositoryError>
    func runReadAndBlock<T>(f: (Realm) throws -> T) throws -> T
    func runWriteAndBlock(f: (Realm) throws -> Void) throws -> Void

ukitaka

struct PartialFunction<A, B> {
    let f: A throws -> B
    init(_ f: A throws -> B) {
        self.f = f
    }
}

extension Optional {
    func collect<B>(f: PartialFunction<Wrapped, B>) -> Optional<B> {
        if let res = try? self.map(f.f) {

ukitaka

$ swiftc -emit-silgen -sdk $(xcrun --show-sdk-path --sdk macosx) date.swift > date.sil