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
Swift - Pushing technology limits
Search
Konstantin
April 30, 2015
Programming
1
210
Swift - Pushing technology limits
Why Swift is Awesome!!!
Konstantin
April 30, 2015
Tweet
Share
More Decks by Konstantin
See All by Konstantin
How does complier see your app
konstantinkoval
4
110
Swift Package Manager
konstantinkoval
2
150
Swift rEvolution
konstantinkoval
1
220
Refactoring an Ugly Objective-C with Swift
konstantinkoval
0
200
React Native - from a mobile (iOS) developer prospective
konstantinkoval
0
61
WatchKit
konstantinkoval
0
53
Intro in WatchKit and Watch apps
konstantinkoval
0
44
Functional Swift
konstantinkoval
1
110
I love swift.pdf
konstantinkoval
1
170
Other Decks in Programming
See All in Programming
VS Code をプロダクトにどう取り込むか
onomax
1
440
検証も兼ねて個人開発でHonoとかと向き合った話
hanetsuki
1
1.2k
TYPO3 v13 – The road to LTS: What's new and new APIs
luisasofie_xoxo
0
210
雑に思考を整理する技術と効能
konifar
60
29k
はてなにおける CSS Modules、及び CSS Modules に足りないもの / CSS Modules in Hatena, and CSS Modules missing parts
mizdra
7
950
Fast JSX: Don't clone props object #28768
yossydev
1
130
"config" ってなんだ? / What is "config"?
okashoi
0
240
Amazon SQSコンシューマー疎結合への旅 - 出張! #DevelopersIO IT技術ブログの中の人が語る勉強会 #3
quiver
0
280
Komplexe Oberflächen mit SVG und der Web Animation API
joergneumann
0
680
サイコロで理解する統計的仮説検定の考え方
tatamiya
4
960
Prepare for Jakarta EE 11 - Performance and Developer Productivity
ivargrimstad
0
870
禅の心を手に入れよ
eltociear
1
140
Featured
See All Featured
Art, The Web, and Tiny UX
lynnandtonic
289
19k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
155
14k
Into the Great Unknown - MozCon
thekraken
10
1k
YesSQL, Process and Tooling at Scale
rocio
164
13k
Writing Fast Ruby
sferik
621
60k
The MySQL Ecosystem @ GitHub 2015
samlambert
243
12k
Why You Should Never Use an ORM
jnunemaker
PRO
51
8.6k
Large-scale JavaScript Application Architecture
addyosmani
504
110k
What the flash - Photography Introduction
edds
64
11k
Building a Scalable Design System with Sketch
lauravandoore
456
32k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
227
16k
What's in a price? How to price your products and services
michaelherold
237
11k
Transcript
Kostiantyn Koval 1 Rocketfarm.no
Swift - Pushing technology limits
How should look Modern Language?
Clean and Clear
Programs must be written for people to read, and only
incidentally for machines to execute 1 Harold Abelson
.global _start .text _start: # write(1, message, 13) mov $1,
%rax mov $1, %rdi mov $message, %rsi mov $13, %rdx syscall message: .ascii "Hello, world\n" mov rax, 1 mov rdi, 1 mov rsi, message mov rdx, 13 syscall
None
int compare(const void * a, const void * b) {
if ( *(uint32_t*)a < *(uint32_t*)b ) { return -1; } if ( *(uint32_t*)a > *(uint32_t*)b ) { return 1; } return 0; }
!
@interface Person : NSObject @property (nonatomic) NSString* name; @property (nonatomic)
NSInteger age; @end @implementation Person - (instancetype)initWith:(NSString *)name age:(NSInteger)age { self = [super init]; if (self) return nil; _name = name; _age = age; return self; } @end @implementation TestPerson - (void)test { NSArray *people = @[ [[Person alloc] initWith:@"Sam" age:10], [[Person alloc] initWith:@"Sara" age:24], [[Person alloc] initWith:@"Ola" age:42], [[Person alloc] initWith:@"Jon" age:19]]; NSArray *kids = [people filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"age < 18"]]; NSMutableArray *names = [NSMutableArray new]; for (Person *person in people) { [names addObject:person.name.lowercaseString]; } } @end
!
struct Person { let name: String let age: Int }
let people = [ Person(name: "Sam", age: 10), Person(name: "Sara", age: 24), Person(name: "Ola", age: 42), Person(name: "Jon", age: 19)] let kids = people.filter { person in person.age < 18 } let names = people.map { $0.name.lowercaseString }
!
60% Less Code 13 Lines Vs 34 Lines
Less Code Less Bugs Less money
Type inference var age = 19 var name = "Sara"
var isEmpty = name.isEmpty VS var age: Int = 19 var name: String = "Sara" var isEmpty: Bool = name.isEmpty
No Semicolons ; var age = 19
Other 4 Closures 4 Default initializers 4 Default parameters 4
Subscripts 4 Operators
//Closures let numbers = [1, 2, 3, 4] numbers.map {$0
+ 10} // Subscripts let num2 = numbers[2] //Operators infix operator <<< { } func <<< (a: Vector, b: Vector) -> Vector { return Vector(x: a.x + b.x, y: a.y + b.y) }
Smart
Features Rich
Features Reach 4 Functional Programming 4 OOP 4 Generic Purpose
4 Value types 4 Tuples 4 Optionals 4 ...
Safe
Safe 4 Types 4 Type casting 4 tUpos 4 Existing
Methods 4 Correct instructions - Exception
None
Error Handling func readFromFile(file: String) -> (result: String?, error: NSError?)
{ return ("file Content", nil) } let result = readFromFile("file.txt") if result.error != nil { println("handle error") }
Optionals
Optionals 4 Represent absence of a value 4 Safe Nil
handling [NullPointerException] 4 Nil value for Value type, Int: 0, -1, NSnotFound, IntMax
'?' Type String != String? Int != Int? func person(name:
String) -> Person func person(name: String, age: Int?) -> Person person("Elvis", age: nil) person(nil, age: 27) //Error
Optionals Is a Box that could store a value inside
or could be empty You can interact with the value only throw Box API
Safe var person: Person? = people.find("Elvis") // 1 - Unwrapping
`!` if person != nil { println("found \(person!)") } //2 - Optional binding if let person = person { println("found \(person)") } else { println("found found") }
Multithreading
Multithreading 4 Immutable value type 4 explicit 'self' capturing processAsync(var
people: [Peope]) -> [Peope] { // ... Run Async people.remove(...) return people } var people: [People] //Async code processAsync(people) processAsync(people) processAsync(people)
Fast
Fast 18 Times > Objetive-C 2,9 Times > C
Let's make better mistakes tomorrow
Thanks! QA?? ! Twitter - @KostiaKoval GitHub - /KostiaKoval Kostiantyn
Koval - Rocketfarm.no