Python

Elixir has an unless keyword, which I don’t recall seeing in any other language I’ve used.

“Elixir exceptions are intended for things that should never happen in normal operation”

Trailing ! in a function name is an Elixir convention indicating failure raises an exception. We’ve already seeing this in the File.open! call in previous exercises.

Strings are UTF-8 encoded.

Earlier chapters focused on list processing via recursion. Now we’re getting into the more familiar iterables.

Making the best of recursion.

Unlike Python lambda functions, Elixir anonymous functions can be arbitrarily complex (though I guess there is a limit to what is practicable from a maintainability point of view).

I’m used to skimming technical books. The decision to make notes and document my learning experience is causing me to slow down and spend more time with what I’m reading.