10 lessons we can learn from the 36,303 (and counting) Swift commits

Presented at Devoxx 2016

Transcript

1. 10 lessons we can learn from the 36,303 (and counting) Swift commits (And it's not a clickbait)
3. 1. Everything has a beginning
6. Makefile lib/Lex/Lexer.cpp lib/Lex/Makefile lib/Makefile lib/Parse/Makefile lib/Parse/Parser.cpp tools/Makefile tools/swift/Makefile tools/swift/swift.cpp
7. swift.cpp int main() { }
8. 11 commits later
9. 386 commits later
11. 2/A. SVN is not dead yet (At least not to everybody)
15. 2/B. If you struggle with git you're not alone
24. 3. 36% of Swift is written in Swift
26. 4. ♥ is in the stdlib
27. Some examples... → Optionals → Array → Dictionary
28. ...Other examples → String → Int → Bool → Bit
30. 5. I tawt I taw a python
33. 6. Generate Your Boilerplate
34. Template %{ integerBinaryOps = [ (x[:-1], x[-1], x[:-1].capitalize(), 'a result') for x in 'add+ subtract- multiply* divide/'.split() ] + [ ('remainder', '%', 'Divide', 'the remainder') ] }% Usage public protocol _IntegerArithmeticType { % for name,_,Action,result in integerBinaryOps: /// ${Action} `lhs` and `rhs`, returning ${result} and a `Bool` that is /// true iff the operation caused an arithmetic overflow. static func ${name}WithOverflow(lhs: Self, _ rhs: Self) -> (Self, overflow: Bool) % end }
35. 7. Comment your complexity
36. /// Insert `newElement` at index `i`. /// /// Invalidates all indices with respect to `self`. /// /// - Complexity: O(`self.count`). public mutating func insert(newElement: Character, atIndex i: Index) { withMutableCharacters { (inout v: CharacterView) in v.insert(newElement, atIndex: i) } }
37. 8. We are the facilitators of our own creative evolution
38. github.com/apple/swift-evolution
41. Commonly rejected changes github.com/apple/swift-evolution/blob/master/ commonly_proposed.md
42. March, 21st 2016 Swift 2.2 Integrates the community feedback
43. 9. We all code by night
45. 10. It's (too) easy to complain about someone else's code
50. Thanks!
51. Simone Civetta @viteinfinite
52. Sources → Swift Weekly Brief by Jesse Squires → Swift Evolution Mailing List → github.com/apple