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DAY 7

Closures, part two


Yesterday you learned the basics of closures, but today things get a little trickier. But that’s OK: Benjamin Franklin once said, “energy and persistence conquer all things” – you can do this!

Sometimes closure syntax can be a bit hard on your eyes, and this will really be apparent as you work through today’s lessons. If you find it a bit overwhelming – if you’re staring at some code and aren’t 100% sure of what it means – just go back one video and watch it again to give your memory a little nudge.

As a reminder, SwiftUI uses closures extensively so it’s worth taking the time to really understand what’s going on here. Yes, they are probably the most complex feature of Swift, but it’s a bit like cycling up a hill – once you’ve reached the top, once you’ve mastered closures, it’s all gets much easier.

Today you have seven one-minute videos to watch, and you’ll learn about how closures accept parameters and return values. Once you’ve completed each video there’s a short test to help make sure you’ve understood what was taught.

  1. Using closures as parameters when they accept parameterstest
  2. Using closures as parameters when they return valuestest
  3. Shorthand parameter namestest
  4. Closures with multiple parameterstest
  5. Returning closures from functionstest
  6. Capturing valuestest
  7. Closures summarytest

Remember, stay accountable: tell the world that you’ve just learned all about closures in Swift, and discuss them with others who are learning too.

Need help? Tweet me @twostraws!

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