WWDC - Developer's Living

1. Swift4

2. Codable?

3. Dictionary!

4. Dictionary of Swift 4
Hanawa Takuro LIFULL Co., Ltd.

5. !Hanawa Takuro
facebook.com/takuro.hanawa
🏢LIFULL Co.,Ltd.
iOS Engineer
Music - Diggin’/ WWDC

6. Agenda
• Initialization for Sequence
• Duplicate Key
• Filter and Map
• Default Values
• Grouping
• Reserving Capacity

7. Initialization for Sequence

8. init(uniqueKeysWithValues:)
• Key-Value Sequence
Dictionary 👏

9. init(uniqueKeysWithValues:)
•
Key-Value

10. • Swift3 zip
💪
init(uniqueKeysWithValues:)

11. Duplicate Key

12. init(_:uniquingKeysWith:)
• Key
⚠

13. init(_:uniquingKeysWith:)
• Key
Key Value 👏
Amazing.

14. merging(_:uniquingKeysWith:)
• Dictionary
merging merge(mutating)

15. Filter and Map

16. filter(_:)
• Collection filter

17. filter(_:)
• Dictionary Dictionary
filter 👏

18. mapValues(_:)
• Dictionary Value
Dictionary 🤔

19. mapValues(_:)
• Dictionary Value
Value Dictionary 👏
Awesome.

20. Default Values

21. subscript(_:default:)
• Value Non-Optional ”??”
(Nil Coalescing Operator) 🤔

22. subscript(_:default:)
• Key Value

23. subscript(_:default:)
• += Value 😭

24. subscript(_:default:)
Sweet.

25. Grouping

26. init(grouping:by:)
• Dictionary
🤔

27. init(grouping:by:)
• Sequence
Key Dictionary 👏
Dude.

28. Reserving Capacity

29. init(grouping:by:)
• Dictionary
👏

30. Conclusion
• Key-Value Sequence
• Key
• Filter Map(Value)
•
• Sequence
•