DAY 3
Complex data types, part 1
Today we’re going to look at some more complex data types that group data together. Understanding the differences between them, and especially knowing which to use and when, can sometimes trip folks up when they are learning – as Joseph Campbell once said, “computers are like Old Testament gods: lots of rules and no mercy.”
Don’t worry, though: you’ll find that the three types we’re learning today cover the overwhelming majority of requirements you’ll need for grouping data, and if you choose the wrong one when you’re learning then nothing bad is going to happen.
In fact, a common mistake folks make while learning is they have a fear of running their code. Trust me on this: while you’re following all the code here, none of the code you write can somehow break your computer. So, make a change and run it. Make another change and run that. Just try changing your values until you feel comfortable with what’s happening – it all helps.
Today you have four tutorials to follow, and you’ll meet things like arrays, dictionaries, sets, and more. After watching each video you’re welcome to go through some optional extra reading if you want extra clarification on a topic, and there are some short tests to help make sure you’ve understood what was taught.
- How to store ordered data in arrays
- Optional: Why does Swift have arrays?
- Test: Arrays
- How to store and find data in dictionaries
- Optional: Why does Swift have dictionaries as well as arrays?
- Optional: Why does Swift have default values for dictionaries?
- Test: Dictionaries
- Test: Dictionary default values
- How to use sets for fast data lookup
- Optional: Why are sets different from arrays in Swift?
- Test: Sets
- How to create and use enums
- Optional: Why does Swift need enums?
- Test: Enumerations
You’ve finished day three now, and you’re starting to write useful Swift code – make sure to tell the world about your progress!
Share your progress!
If you use Twitter, the button below will prepare a tweet saying you completed today, along with a celebratory graphic, the URL to this page, and the challenge hashtag. Don't worry – it won't be sent until you confirm on Twitter!
Need help? Tweet me @twostraws!
SPONSORED Build a functional Twitter clone using APIs and SwiftUI with Stream's 7-part tutorial series. In just four days, learn how to create your own Twitter using Stream Chat, Algolia, 100ms, Mux, and RevenueCat.
Sponsor Hacking with Swift and reach the world's largest Swift community!
100 Days of SwiftUI
The 100 Days of SwiftUI is a free collection of videos, tutorials, tests, and more to help you learn SwiftUI faster. Click here to learn more, or watch the video below.
