takasek’s gists

takasek / CodePiece.swift

Created September 30, 2016 12:31

DictionaryのValueがOptionalならunwrapするコード #CodePiece

	import Foundation

	protocol OptionalType {
	associatedtype Wrapped
	var optional: Wrapped? { get }
	}
	extension Optional : OptionalType {
	var optional: Wrapped? { return self }
	}

takasek / CodePiece.swift

Created September 25, 2016 16:27

Swift3ではすべての型はAnyObjectにブリッジできるようになったが、果たして `===` した結果はどうなるのか？と調べてみた #CodePiece

	struct Struct {
	func method() {}
	}
	enum Enum { case a }
	class Class {
	func method() {}
	}

	func compareSelf<T: Any>(_ target: T) {
	print(target, type(of: target), (target as AnyObject) === (target as AnyObject))

takasek / CodePiece.swift

Created September 25, 2016 15:43

同一のclassでboxingされるのは、as AnyObjectしたときだけ。as Anyではダメ(❗) #CodePiece

	import Foundation

	let aName = Notification.Name(rawValue: "a")

	struct Struct { let id: Int }

	let structAsAny1 = Struct(id: 1) as AnyObject
	let structAsAny2 = Struct(id: 2) as AnyObject
	let structAsAny3 = Struct(id: 3) as AnyObject

takasek / CodePiece.swift

Created September 25, 2016 15:40

@es_kumagai @rizumita なんだか掴めてきた気がします #CodePiece

	let structAsAny1 = Struct(id: 1) as Any

	let notification = Notification(name: aName, object: structAsAny1, userInfo: nil)
	(notification as AnyObject) === (notification as AnyObject) //false

	(structAsAny1 as AnyObject) === (structAsAny1 as AnyObject) //false

	let structAsAnyObject = Struct(id: 1) as AnyObject
	(structAsAnyObject) === (structAsAnyObject) //true

takasek / CodePiece.swift

Created September 25, 2016 13:08

as Anyしたstructの同一性判定がうまくいってない話。コード置いておきますね。実行するたびに結果が変わる不思議なコードです。 #CodePiece

	import Foundation

	let aName = Notification.Name(rawValue: "a")

	struct Struct { let id: Int }
	extension Struct: Equatable {
	public static func ==(lhs: Struct, rhs: Struct) -> Bool {
	return lhs.id == rhs.id
	}
	}

takasek / CodePiece.swift

Created September 25, 2016 11:59

もしかして、Equatableに適合させてやればstructもNotification.objectにできるか…？と思ったら、なんか…Equatableは見てないっぽい。 #CodePiece

	import Foundation

	let aName = Notification.Name(rawValue: "a")

	struct Struct: Equatable {
	let id: Int
	static func ==(lhs: Struct, rhs: Struct) -> Bool {
	print("\(lhs.id) vs \(rhs.id) = \(lhs.id == rhs.id)")
	// 👆ログに出ない。ってことは、この == 、呼ばれてない！
	return lhs.id == rhs.id

takasek / CodePiece.swift

Created September 25, 2016 11:37

NSNotification.objectもAny?を受けられるようになっているので、これもstructやenumが効くのか！？マジで！？と思って実験してみた結果。だめじゃん！ #CodePiece

	let aName = Notification.Name(rawValue: "a")

	class Class {}
	struct Struct {}
	enum Enum {
	case a, b
	}

	let aClass = Class()
	let aStruct = Struct()

takasek / CodePiece.swift

Created September 25, 2016 11:16

Swift3のNotification.userInfo、 `[AnyHashable: Any]?` ってことは、StructやEnumを受け取れるんだ…！ #CodePiece

	let aName = Notification.Name(rawValue: "a")

	class Class {}
	struct Struct {}
	enum Enum {
	case a, b
	}

	let aClass = Class()
	let aStruct = Struct()

takasek / CodePiece.txt

Created September 22, 2016 14:48

で、どうやってrc版を優先使用するかだけど… http://devcenter.bitrise.io/docs/cocoapods-how-to の「早くて汚いやり方」でいいかな #CodePiece

	[Notifwift]@23:41 % gem uninstall --all --executables cocoapods
	ERROR: While executing gem ... (Gem::InstallError)
	cocoapods is not installed in GEM_HOME, try:
	gem uninstall -i /Users/tksk_mba/.rvm/gems/ruby-2.2.1@global cocoapods
	[Notifwift]@23:42 % gem uninstall -i /Users/tksk_mba/.rvm/gems/ruby-2.2.1@global cocoapods

	Select gem to uninstall:
	1. cocoapods-1.0.1
	2. cocoapods-1.1.0.rc.2
	3. All versions

takasek / CodePiece.swift

Created September 19, 2016 06:29

NSObject継承したclassで、function型プロパティの中にあるself( Self->()->Self )って何だろう、ということで調べた結果 #CodePiece

	func check(_ target: Any, as name: String, at method: String) {
	print("　\(method)\(name) =")
	print("　　　👔 \(type(of: target))")
	print("　　　🍖 \(target)")
	}

	final class SubClassOfNSObject: NSObject {
	override init() {
	print("🌱init start")
	super.init()

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