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Dictionary for Swift4
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Takuro Hanawa
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Dictionary for Swift4
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 •
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