miniblog.

Do commas ever appear in idiomatic Clojure? It's syntactically legal but I don't think I've ever seen them in the wild.

Lisp is the only language I've seen where it's idiomatic to have some locals scoped to the *middle* of a function. It's a consequence of let blocks. It's neat, but I rarely miss it elsewhere. I'm happy with "scoped from here to the end of the block" in e.g. C or Rust.

I find myself writing .iter().map(|x| ...).collect() really often in Rust. I'm wondering if I should write a helper method on Vec, but it seems less idiomatic. Iterators compose, but they're less versatile (no indexing) and awkward to return from functions.