What are the differences between computed properties and lazy properties in Swift?
What are the differences between computed properties and lazy properties in Swift? How can protocols be used to develop structure and clarity within your code? The topics discussed in this course will build on your understanding of the Swift programming language and will explain how to add more value to the classes and structures that you have created in your Swift code. Understanding how properties, extensions, and protocols function in Swift is essential for writing effective and usable code.
In Swift: Properties and Protocols, we’ll look at properties and protocols in Swift, the advanced aspects of properties, and the customization power they give you. You’ll learn about computed properties, as well as how to create and use them. You’ll also learn about lazy properties, which are properties you create only when you need them, and how you can implement them. We will also talk about protocols and how they can give you clarity and direction in your code through things like protocol extensions.
Learning Objectives
- Understand Swift properties
- Identify how to create type extensions
- Recognize how protocols work in Swift.
Skills you’ll gain
Communications ProtocolsCustom ProtocolProperty Specification LanguageProtocol BuffersProtocol AnalysisProtocol AnalyzerWhat You'll Learn
- Understand Swift properties and the advanced aspects they offer
- Create and use computed properties in Swift
- Implement lazy properties that are created only when needed
- Create type extensions in Swift
- Recognize how protocols work to give code structure and clarity
- Use protocol extensions to add direction to your code
Key Takeaways
- Understanding how properties, extensions, and protocols function in Swift is essential for writing effective and usable code.
- Computed properties and lazy properties are distinct property types, with lazy properties created only when they are needed.
- Protocols can provide clarity and direction in code through features such as protocol extensions.
- The course builds on an existing understanding of the Swift programming language to add more value to classes and structures.
- Properties and protocols give developers customization power over the classes and structures in their Swift code.
Frequently Asked Questions
What topics does this course cover?
The course covers Swift properties and protocols, including computed properties, lazy properties, extensions, protocols, and protocol extensions, along with the advanced aspects of properties and the customization power they provide.
Who is this course for?
It is for learners who already have an understanding of the Swift programming language, as the topics build on that understanding to add more value to the classes and structures they have created in their Swift code.
What will I learn to do with properties?
You will learn about computed properties and how to create and use them, as well as lazy properties, which you create only when you need them, and how to implement them.
What are the learning objectives of this course?
The objectives are to understand Swift properties, identify how to create type extensions, and recognize how protocols work in Swift.
What lessons are included?
The course includes lessons on Computed Properties, Lazy Properties, Extensions, Protocols, and Protocol Extensions.
Transcript
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Hello, my name is Mark Nair, and in these lessons you'll learn about properties and protocols in Swift, including computed properties, lazy properties, extensions, protocols, and protocol extensions. The struct right here has three stored properties, there's name, distance, and kilometers, and time and minutes. But we can also do something where we calculate information within a property, that's called a computed property. This kind of property computes every, it's value every time you access it. Let's set up a computed property for this marathon runner, average runner speed. So inside of the struct, I will add average speed of a type string, and now I will add our curly braces, just like this. Now I'll add a few things to calculate the average speed. So my idea here is that when we call this average speed, this method, well, it's a computed property, it will calculate this information for us. Let's try this out. I'll make a new variable called Tom, and Tom is a marathon runner, it covers a distance of five kilometers, about 25 minutes. Now when I come and access, I'll just print Tom, but now I'll print the computed property at average speed, and there we are, Tom runs 0.2 kilometers a minute. Now I did this business here with the floor, and multiplying by 100 and 100, so I could get a good rounded number here. But the idea is that all of this information here is computed when I call it based on this information here. So if I change this, I can run 15 kilometers and 25 minutes, then he's running 0.6 kilometers a minute. And that is what a computed property does, computes the solution when we call for it. Thanks for watching. Stay tuned for the next lesson where I'll show you how to use lazy properties.
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