Cats
We Scala programmers love abstractions and Cats is one of the most popular libraries. At the same time, Cats is notorious for having a steep learning curve. Functors, Applicatives, Semigroupals, not to mention the M word. Few people make sense of them all. For the rest of us mortals, it's a brick wall. Certainly was for me when I started.
Read more about the course
But it doesn't have to be. After lots of pain, I understood how this library can be fun to learn AND write with, IF - and that's a big if - you follow a clear structure and a smooth sequence. The bad news is that's tough to make. The good news is that I think (there's a good chance that) you have it in front of you.
You're looking at the only course on the web that doesn't cost an arm and a leg (and a real cat) and will get you through everything you need to know to be productive. Down to earth, hands-on, no psychobabble, and no F[_] bombs until you're ready.
This course is for Scala engineers at least at the level of the Advanced Scala course. By the end of this course, you'll be able to use any Cats feature without any problems.
Watch Online Cats
| # | Title | Duration |
|---|---|---|
| 1 | Welcome | 08:16 |
| 2 | How to Make the Best Out of This Cours | 02:33 |
| 3 | Scala Essentials Recap | 31:59 |
| 4 | Scala Implicits Recap | 25:49 |
| 5 | Type Classes | 14:33 |
| 6 | Introduction to Cats | 18:27 |
| 7 | Type Classes and Variance | 22:04 |
| 8 | Semigroups | 00:00 |
| 9 | Monoids | 00:00 |
| 10 | Functors | 28:43 |
| 11 | Monads, Part 1 | 00:00 |
| 12 | Monads, Part 2 | 00:00 |
| 13 | Using Monads | 35:10 |
| 14 | Custom Monads | 36:04 |
| 15 | Monad Transformers | 33:45 |
| 16 | Readers | 28:57 |
| 17 | Writers | 25:59 |
| 18 | Evaluation | 28:37 |
| 19 | State | 31:56 |
| 20 | Data Validation, Part 1 | 16:01 |
| 21 | Data Validation, Part 2 | 20:50 |
| 22 | Semigroupal | 23:49 |
| 23 | Applicative | 20:00 |
| 24 | Weaker Applicatives: Apply | 15:47 |
| 25 | Weaker Monads: FlatMap | 13:12 |
| 26 | Handling Errors | 29:24 |
| 27 | Folding | 21:28 |
| 28 | Traversing, Part 1 | 21:28 |
| 29 | Traversing, Part 2 | 21:54 |
| 30 | Kleisli | 17:16 |
| 31 | Contravariant | 21:00 |
| 32 | Invariant | 24:04 |
| 33 | You ROCK! | 00:31 |
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