DAY 2

Complex data types

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Lynch’s Law says “when the going gets tough, everyone leaves.” Anyone can complete the first day of a course, but it takes diligence to come back for day 2 – well done for sticking with it!

Yesterday we looked at simple data types – things that hold one value, like a single number or a single string of letters. Today we’re moving on to complex types, that hold multiple values or aren’t quite so straightforward.

At various points you might think “do I really need to know this?” And the answer is yes – if it’s here in this course, you absolutely need to know it!

Today you have eleven one-minute videos to watch, and you’ll meet things like arrays, dictionaries, and enums. As before, if you want to dive deeper into each topic there is optional further reading, but you don’t need to read that unless you want to. Regardless, there’s a short test to help make sure you’ve understood what was taught.

1. Arrays
   • Optional: Why does Swift have arrays?
   • Test: Arrays
2. Sets
   • Optional: Why are sets different from arrays in Swift?
   • Test: Sets
3. Tuples
   • Optional: How are tuples different from arrays in Swift?
   • Test: Tuples
4. Arrays vs sets vs tuples
   • Optional: When should you use an array, a set, or a tuple in Swift?
   • Test: Arrays vs sets vs tuples
5. Dictionaries
   • Optional: Why does Swift have dictionaries as well as arrays?
   • Test: Dictionaries
6. Dictionary default values
   • Optional: Why does Swift have default values for dictionaries?
   • Test: Dictionary default values
7. Creating empty collections
   • Optional: Why would you want to create an empty collection?
   • Test: Creating empty collections
8. Enumerations
   • Optional: Why does Swift need enums?
   • Test: Enumerations
9. Enum associated values
   • Optional: Why would you want to associate a value with an enum case?
   • Test: Enum associated values
10. Enum raw values
    • Optional: Why do Swift’s enums have raw values?
    • Test: Enum raw values
11. Complex types: Summary
    • Test: Complex types

Need help? Tweet me @twostraws!

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