Radek Pietruszewski | Swifty Methods

Presented at www.swiftsummit.com

Transcript

1. Radek
2. “Programs must be written for people to read, and only incidentally for machines to execute” — Structure and Interpretation of Computer Programs
3. “Programs must be written for people to read, and only incidentally for machines to execute”
4. Clarity
5. Clever is dumb
6. Clarity is worth it
8. clarity ≠ verbosity
9. naming things
10. naming things stringByReplacingOccurrencesOfString:withString:
11. naming things stringByReplacingOccurrencesOfString:withString: performSelectorOnMainThread:withObject:waitUntilDone:
12. naming things stringByReplacingOccurrencesOfString:withString: performSelectorOnMainThread:withObject:waitUntilDone: tableView:targetIndexPathForMoveFromRowAtIndexPath:toProposedI
13. [string componentsSeparatedByString:@"\n"];
14. [string componentsSeparatedByString:@"\n"]; huh?
15. [string componentsSeparatedByString:@"\n"]; huh? NSComponent?
16. [string componentsSeparatedByString:@"\n"]; 95% clear
17. [string componentsSeparatedByString:@"\n"]; 100% verbose 95% clear
18. string.split("\n")
19. string.split("\n") 95% clear
20. Adding more words doesn't help
21. What if you’re not sure?
23. split componentsSeparatedByString
24. Why save bytes?
25. clarity > brevity
26. brevity ⊂ clarity
27. Verbosity ain't free
28. Reading takes effort
29. clear > confusing short > verbose
30. Find the sweet spot
31. Remove the noise
32. split componentsSeparatedByString
33. replace stringByReplacingOccurencesOfString:withString:
34. stringByReplacingOccurencesOfString:withString:
35. stringByReplacingOccurencesOfString:withString:
36. replace
37. Remove the noise
38. let today : NSDate = NSDate()
39. let today = NSDate()
40. ty(activityType: "hash_state") rInfo = ["hash": hash] SURL(string: fallbackURL) omeCurrent() ity = activity ; ; ; ; ;
41. ty(activityType: "hash_state") rInfo = ["hash": hash] SURL(string: fallbackURL) omeCurrent() ity = activity
42. let array: [Int] = [10, 6, 2] array.reduce(0, { (acc: Int, el: Int) -> Int in return acc + el })
43. let array = [10, 6, 2] array.reduce(0, +)
44. string1 string2 [ isEqualToString: ]
45. string1 string2
46. string1 == string2
47. if (foo && foo.bar) { foo.bar.baz() }
48. foo?.bar?.baz()
49. less code to understand is a good thing
50. [[NSWindow alloc] initWithContentRect: frame styleMask: NSTitledWindowMask backing: NSBackingStoreBuffered defer: NO screen: nil]
51. [[NSWindow alloc] initWithContentRect: frame styleMask: NSTitledWindowMask backing: NSBackingStoreBuffered defer: NO screen: nil]
52. init( contentRect: NSRect, styleMask: NSWindowMask = .Titled, backing: NSBackingStoreType = .Buffered, defer: Bool = false, screen: NSScreen? = nil)
53. [[NSWindow alloc] initWithContentRect: frame styleMask: NSTitledWindowMask backing: NSBackingStoreBuffered defer: NO screen: nil]
54. NSWindow(contentRect: frame)
55. Swifty APIs
56. [NSTimer scheduledTimerWithTimeInterval: 1.0 target: self selector: @selector(foo:) userInfo: nil repeats: YES] . . . - (void) foo: (NSTimer *timer) { NSLog(@“Hello world!”) } radex.io/swift/nstimer
57. [NSTimer scheduledTimerWithTimeInterval:1.0] radex.io/swift/nstimer
58. [NSTimer scheduledTimerWithTimeInterval:1.0] radex.io/swift/nstimer
59. [NSTimer scheduledTimerWithTimeInterval:1.0] radex.io/swift/nstimer
60. [NSTimer scheduledTimerWithTimeInterval:1.0] radex.io/swift/nstimer
61. NSTimer.schedule(interval: 1.0) radex.io/swift/nstimer
62. NSTimer.schedule(interval: 1.0, target: self, selector: "foo:", userInfo: nil, repeats: true) func foo(timer: NSTimer) { println("Hello world") } radex.io/swift/nstimer
63. NSTimer.schedule(interval: 1.0, userInfo: nil, repeats: true) { println("Hello world") } radex.io/swift/nstimer
64. NSTimer.schedule(interval: 1.0, repeats: true) { println("Hello world") } radex.io/swift/nstimer
65. NSTimer.schedule(every: 1.0) { println("Hello world") } radex.io/swift/nstimer
66. NSTimer.schedule(every: 1.second) { println("Hello world") } radex.io/swift/nstimer
67. NSTimer.schedule(after: 1.second) { println("Hello world") } radex.io/swift/nstimer
68. [NSTimer scheduledTimerWithTimeInterval: 1.0 target: self selector: @selector(foo:) userInfo: nil repeats: YES] . . . - (void) foo: (NSTimer *timer) { NSLog(@“Hello world!”) } radex.io/swift/nstimer
69. NSTimer.schedule(every: 1.second) { println("Hello world") } radex.io/swift/nstimer
70. Recap: 4 ideas
71. Focus on clarity
72. Don't write clever code
73. clarity ≠ verbosity
75. radex.io/swift/methods @radexp