Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
復習OptionSet
Search
Tomohiro Nishimura
December 26, 2016
Technology
0
270
復習OptionSet
Tomohiro Nishimura
December 26, 2016
Tweet
Share
More Decks by Tomohiro Nishimura
See All by Tomohiro Nishimura
レガシーシステム洗い出し大作戦
sixeight
0
1.6k
我々のRealmはどこからやってくるのか
sixeight
1
400
まだ見ぬAPIに思いを馳せて
sixeight
0
130
今年読んだまんが
sixeight
0
230
べんりな検索ワード
sixeight
0
240
Readable Width in action
sixeight
0
170
UIPreviewInteraction: Overview
sixeight
1
620
Accessing the Music Library
sixeight
1
2.7k
Web APIについての雑談
sixeight
0
400
Other Decks in Technology
See All in Technology
関数型プログラミングで 「脳がバグる」を乗り越える
manabeai
2
220
第4回Snowflake 金融ユーザー会 Snowflake summit recap
tamaoki
1
330
公開初日に Gemini CLI を試した話や FFmpeg と組み合わせてみた話など / Gemini CLI 初学者勉強会(#AI道場)
you
PRO
0
830
敢えて生成AIを使わないマネジメント業務
kzkmaeda
2
500
SRE不在の開発チームが障害対応と 向き合った100日間 / 100 days dealing with issues without SREs
shin1988
1
1.1k
ポストコロナ時代の SaaS におけるコスト削減の意義
izzii
1
190
開発生産性を測る前にやるべきこと - 組織改善の実践 / Before Measuring Dev Productivity
kaonavi
14
8k
Getting to Know Your Legacy (System) with AI-Driven Software Archeology (WeAreDevelopers World Congress 2025)
feststelltaste
1
180
PO初心者が考えた ”POらしさ”
nb_rady
0
220
サイバーエージェントグループのSRE10年の歩みとAI時代の生存戦略
shotatsuge
4
700
AI エージェントと考え直すデータ基盤
na0
17
6.8k
第64回コンピュータビジョン勉強会「The PanAf-FGBG Dataset: Understanding the Impact of Backgrounds in Wildlife Behaviour Recognition」
x_ttyszk
0
130
Featured
See All Featured
For a Future-Friendly Web
brad_frost
179
9.8k
Intergalactic Javascript Robots from Outer Space
tanoku
271
27k
Building Flexible Design Systems
yeseniaperezcruz
328
39k
Why You Should Never Use an ORM
jnunemaker
PRO
58
9.4k
Principles of Awesome APIs and How to Build Them.
keavy
126
17k
Fireside Chat
paigeccino
37
3.5k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
Git: the NoSQL Database
bkeepers
PRO
430
65k
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.4k
The Art of Programming - Codeland 2020
erikaheidi
54
13k
Adopting Sorbet at Scale
ufuk
77
9.5k
Building Better People: How to give real-time feedback that sticks.
wjessup
367
19k
Transcript
෮श0QUJPO4FU ؔϞόΠϧΞϓϦݚڀձ
JE4JYFJHIU w ג ͯͳΞϓϦέʔγϣϯΤϯδχΞ w ۙگ w יϏʔϧͱ͍͏ΠϕϯτͰ࣌ؒҿΈଓ͚ ͨΒඓਫ͕ࢭ·Βͳ͘ͳΓ·ͨ͠
None
0QUJPO4FU
త w Ϣʔβʔ͕ૢ࡞ՄೳͳॲཧΛࢦఆ͢Δ w ྫ͑ w ಡΜͰ͍͍͚Ͳɺॻ͖ࠐΉࣄͰ͖ͳ͍ͱ͔ w ฤूͰ͖Δ͚Ͳɺ৽ن࡞Ͱ͖ͳ͍ͱ͔
&OVNFSBUJPO enum Permission { case read case create case edit
case delete }
&OVNFSBUJPO let permissions: [Permission] = [.read, .create] func read() {
guard permissions.contains(.read) else { forbidden() return } showReadViewController() }
&OVNFSBUJPO w ϦιʔεͷύʔϛογϣϯͱϢʔβʔͷݖݶ w ͜ͷϦιʔεʹରͯ͜͠ͷϢʔβʔ͕Մೳͳૢ࡞ ͳΜͳͷ͔ w ͞Βʹάϧʔϓຖʹݖݶ͕͋ͬͨΓ͢Δͱʜ let resourcePermissions:
[Permission] = [.read] let userPermissions: [Permission] = [.read, .create, .edit, .delete] resourcePermissions.filter { permission in return userPermissions.contains(permission) }
None
#JUXJTFPQFSBUJPO // _ _ _ _ delete edit create read
// 0 0 0 0 1 1 1 1 struct Permission { static let read: UInt8 = 0b00000001 static let create: UInt8 = 0b00000010 static let edit: UInt8 = 0b00000100 static let delete: UInt8 = 0b00001000 } 6*OUʹ໊લ͚ͭΔͱྑͦ͞͏ʜ
#JUXJTFPQFSBUJPO let permissions: UInt8 = Permission.read | Permission.create func read()
{ guard (permissions & Permission.read) != 0 else { forbidden() return } showReadViewController() }
#JUXJTFPQFSBUJPO w ͜ͷϦιʔεʹରͯ͜͠ͷϢʔβʔ͕Մೳͳૢ࡞ ͳΜͳͷ͔ let resource: UInt8 = Permission.read let
user: UInt8 = Permission.read | Permission.create | Permission.edit | Permission.delete let currentPermission = resource & user
None
0QUJPO4FU struct Permission: OptionSet { let rawValue: UInt8 static let
read = Permission(rawValue: 1 << 0) static let create = Permission(rawValue: 1 << 1) static let edit = Permission(rawValue: 1 << 2) static let delete = Permission(rawValue: 1 << 3) }
0QUJPO4FU let permissions: Permission = [.read, .create] func read() {
guard permissions.contains(.read) else { forbidden() return } showReadViewController() }
4FU"MHFCSB func contains(Self) func insert(Self) func update(with: Self) func remove(Self)
func union(Self) func intersection(Self) func symmetricDifference(Self) func formUnion(Self) func formIntersection(Self) func formSymmetricDifference(Self)
4FU"MHFCSB let p: Permission = [.read, .create, .edit] let o:
Permission = [.edit, .delete] p //=> 0111 o //=> 1100 p.union(o) //=> 1111 p.intersection(o) //=> 0100 p.symmetricDifference(o) //=> 1011
0QUJPO4FU w ͜ͷϦιʔεʹରͯ͜͠ͷϢʔβʔ͕Մೳͳૢ࡞ ͳΜͳͷ͔ let resource: Permission = [.read] let
user: Permission = [.read, .create, .edit, .delete] let current: Permission = resource.intersection(user)
None
Γ͍ͨ if case Permission.read = userPermission { print("Can read") }
Γ͍ͨ switch userPermission { case Permission.read: print("Can Read") fallthrough case
Permission.create: print("Can Create") fallthrough case Permission.edit: print("Can edit") fallthrough case Permission.delete: print("Can delete") }
dPQFSBUPS extension Permission { static func ~=(lhs: Permission, rhs: Permission)
-> Bool { return rhs.contains(lhs) } }
None
༇շͳؒͨͪ
༇շͳؒͨͪ w 6*$POUSPM4UBUF w OPSNBM w EJTBCMFE w FUDʜ button.setTitle("དྷ",
for: .normal) button.setTitle("ؔϞό", for: [.highlighted, .selected]) button.setTitle("ΑΖ͘͠", for: .disabled)
Α͍͓Λ