Lessons: 27Length: 3.5 hours
- Overview
- Transcript
2.2 Optionals
The Swift language has some very interesting features built into it, and one of them is the concept of Optionals. Optionals are a new type-safe feature of Swift. They’re similar to nil pointers in Objective-C, except that they work for any type, not just classes.
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1.Introduction
1.1Welcome04:20
1.1
Welcome
04:20
1.2Prerequisites03:05
1.2
Prerequisites
03:05
1.3The REPL07:59
1.3
The REPL
07:59
1.4More About Playgrounds11:00
1.4
More About Playgrounds
11:00
2.Language Constructs
2.1Variables and Constants07:52
2.1
Variables and Constants
07:52
2.2Optionals06:40
2.2
Optionals
06:40
2.3Control Flow Part 1: Loops09:30
2.3
Control Flow Part 1: Loops
09:30
2.4Control Flow Part 2: Conditionals08:33
2.4
Control Flow Part 2: Conditionals
08:33
2.5Comments04:29
2.5
Comments
04:29
2.6Functions18:42
2.6
Functions
18:42
2.7Closures12:07
2.7
Closures
12:07
2.8Classes and Structures06:27
2.8
Classes and Structures
06:27
2.9Properties11:20
2.9
Properties
11:20
2.10Methods10:28
2.10
Methods
10:28
2.11Extensions06:37
2.11
Extensions
06:37
2.12Protocols08:49
2.12
Protocols
08:49
3.Swift and Object Oriented Programming
3.1Object Oriented Programming02:22
3.1
Object Oriented Programming
02:22
3.2Abstraction02:39
3.2
Abstraction
02:39
3.3Encapsulation07:17
3.3
Encapsulation
07:17
3.4Inheritance08:13
3.4
Inheritance
08:13
3.5Polymorphism07:21
3.5
Polymorphism
07:21
4.Built-In Types
4.1The Swift Standard Library02:19
4.1
The Swift Standard Library
02:19
4.2String10:57
4.2
String
10:57
4.3Array13:27
4.3
Array
13:27
4.4Dictionary11:40
4.4
Dictionary
11:40
4.5Numeric Types03:55
4.5
Numeric Types
03:55
5.Conclusion
5.1Goodbye01:19
5.1
Goodbye
01:19
