[DDDDD-20] Live coding: Expressive Projections

Let’s write some event sourced projections! Our weapons of choice include higher order functions, algebraic data types, pattern matching, all the goodies of a modern programming languages. But the secret behind our success will be our Dogged Determination to...

[DDDDD-20] « it’s traverse »

The `traverse` function is so pervasive in functional programming that it became a joke: — How do I do— It's traverse https://twitter.com/search?q=%22it%27s%20traverse%22&src=typed_query Since it's a bit abstract until you actually encounter it,...