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
A Swift Approach (Warsaw 2014)
Search
Kyle Fuller
November 27, 2014
Technology
4
240
A Swift Approach (Warsaw 2014)
Kyle Fuller
November 27, 2014
Tweet
Share
More Decks by Kyle Fuller
See All by Kyle Fuller
Design APIs and deliver what you promised
kylef
0
96
Preparing for the future of API Description Languages
kylef
0
110
Resilient API Design
kylef
1
330
Building a Swift Web API and Application Together
kylef
2
2k
Testing without Xcode - CMD+U 2016
kylef
0
240
End-to-end: Building a Web Service in Swift (MCE 2016)
kylef
2
480
Designing APIs for Humans - Write the Docs 2016
kylef
0
330
Embracing Change - MBLTDev 2015
kylef
3
680
Practical Declarative Programming (360 iDev 2015)
kylef
3
500
Other Decks in Technology
See All in Technology
僕たちが「開発しやすさ」を求め 模索し続けたアーキテクチャ #アーキテクチャ勉強会_findy
bengo4com
0
1.9k
2025新卒研修・HTML/CSS #弁護士ドットコム
bengo4com
3
13k
【Λ(らむだ)】最近のアプデ情報 / RPALT20250729
lambda
0
230
o11yツールを乗り換えた話
tak0x00
1
150
Tableau API連携の罠!?脱スプシを夢見たはずが、逆に依存を深めた話
cuebic9bic
3
210
Unson OS|48時間で「売れるか」を判定する AI 市場検証プラットフォーム
unson
0
170
S3 Glacier のデータを Athena からクエリしようとしたらどうなるのか/try-to-query-s3-glacier-from-athena
emiki
0
180
Rubyの国のPerlMonger
anatofuz
3
730
【新卒研修資料】数理最適化 / Mathematical Optimization
brainpadpr
25
11k
Kiroでインフラ要件定義~テスト を実施してみた
nagisa53
3
300
Findy Freelance 利用シーン別AI活用例
ness
0
300
Foundation Model × VisionKit で実現するローカル OCR
sansantech
PRO
0
290
Featured
See All Featured
The Pragmatic Product Professional
lauravandoore
36
6.8k
Build The Right Thing And Hit Your Dates
maggiecrowley
37
2.8k
The Straight Up "How To Draw Better" Workshop
denniskardys
235
140k
Rails Girls Zürich Keynote
gr2m
95
14k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
50k
Typedesign – Prime Four
hannesfritz
42
2.7k
Scaling GitHub
holman
461
140k
Optimizing for Happiness
mojombo
379
70k
Keith and Marios Guide to Fast Websites
keithpitt
411
22k
Embracing the Ebb and Flow
colly
86
4.8k
Balancing Empowerment & Direction
lara
1
530
Practical Orchestrator
shlominoach
190
11k
Transcript
A SWIFT APPROACH KYLEFULLER
KYLEFULLER
None
None
NEW CONCEPTS
RUNTIME
@objc / NSObject
NSKeyValueObserving
RUNTIME
WWDC 2015
OPTIONALS?
func compute() -> Bool?
true false neither
LACK OF A VALUE
NOT AN EMPTY VALUE
CAN'T WE DO THIS IN OBJECTIVE-C?
nil Nil NULL CGRectNull -1 0 NSNotFound NSNull ...
EXPRESS YOU DON'T ACCEPT NIL
EXPRESS YOU WILL NOT RETURN NIL
/// You **MUST** pass in a URL - (instancetype)initWithURL:(NSURL *)URL
{ NSParameterAssert(URL != nil); }
- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)path { return nil; }
None
RUNTIME ERROR
RUNTIME ERROR
COMPILE ERROR
None
TUPLES
func get(username:String) -> (Person?, NSError?)
let person, error = get("Kyle")
OBJECTIVE-C
NSError *error; Person *person = [Person getPerson:@"Kyle" error:&error];
NAMED TUPLES
func get(username:String) -> (person:Person?, error:NSError?)
let result = get("Kyle") result.person result.error
- (NSArray *)getPerson:(NSString *)username; - (NSDictionary *)getPerson:(NSString *)username;
NSDictionary *components = [Person getPerson:@"kyle"]; Person *person = components["person"]; NSError
*error = components["error"];
TYPE SAFETY?
FRAGILE
ENUMERATIONS
enum Result { case Success(String) case Error(Error) }
switch result { case .Error(let error): println("There was an error
(\(error)).") case .Success(let string): println("\(string)") }
CLOSURES
EVERYTHING IS A CLOSURE
class TestObject { func testA() -> () { println("first test")
} var testB:(() -> ()) = { println("second test") } }
let testing = TestObject() testing.testA() testing.testB()
testing.testB = testing.testA
testing.testB() // Actually calls testA
CONSISTENCY
FUNCTIONAL
None
let string = "Hello World" let matches:[NSTextCheckingResult] = /* regex
for words in string */ matches.map { string.substringWithRange($0.range) }
let string = "Hello World" let matches:[NSTextCheckingResult] = /* regex
for words in string */ var strings = [String]() for match in matches { let catch = string.substringWithRange(match.range) strings.append(catch) }
func reduce(initial, combine) -> result
combine : ((previous, current) -> (result))
let items = [["a", "b"], ["c", "d"], ["e"]] items.reduce([]) {
initial, expressions -> [String] in initial + expressions } => ["a", "b", "c", "d", "e"]
let items = [["a", "b"], ["c", "d"], ["e"]] items.reduce([], +)
=> ["a", "b", "c", "d", "e"]
func +<T>(lhs:[T], rhs:[T]) -> [T]
items.sort { $0 > $1 }
items.sort(>)
items.filter { $0.hasPermission }
func isAdmin(user:User) -> Bool { return user.username == "Kyle" }
users.filter(isAdmin)
GENERICS
Array<String>
Dictionary<String, Int>
func max<T : Comparable>(a:T, b:T) -> T { return a
> b ? a : b }
max(anInteger, anotherInteger) max(aFloat, anotherFloat) max(aString, anotherString)
PATTERN MATCHING
let point = (1, 2) switch point { case (0,
0): println("(0, 0) is at the origin.") case (-2...2, -2...2): println("(\(point.0), \(point.1)) is near the origin.") default: println("The point is at (\(point.0), \(point.1)).") } // prints "(1, 2) is near the origin."
@auto_closure
delay(5, println("Hello World"))
func delay(time:UInt32, block:@auto_closure) { sleep(time) block() }
BUILDING ASSERT() IN SWIFT
assert(someExpensiveComputation() != 42)
func assert(predicate : () -> Bool) { #if !NDEBUG if
!predicate() { abort() } #endif }
PLAYGROUNDS
PLAYGROUNDS
SWIFT
SAFER
CONVENTIONS
CONVENTIONS
LANGUAGE CONSTRAINTS
BETTER CODE
BETTER DEVELOPERS
LESS BUGS
WE'RE ALL BEGINNERS
PERFECTING
BREAKING CHANGES
- Xcode 6.1 + Xcode 6.1.1
FOR GOOD, NOT EVIL
!
FILE RADARS
FUTURE
COMMON DESIGN PATTERNS
KYLEFULLER