hello. are there examples of how to specify a deps in info.rkt that includes a git dependency for automatic installation via raco pkg install?

nm, i found a schema at https://docs.racket-lang.org/pkg/Package_Concepts.html#%28tech._package._source%29

How do i match zero-or-one using match? I see a way to do zero-or-more…

relatedly, is there a way to do matching/destructuring using lambda argument declaration style (what I think racket calls gen-formals, and in common lisp would be called a lambda list)?

As an interface, what do people think about (map lambda arr) vs (map arr lambda)?

@jjwiseman there’s probably a more succinct way, but you can use or to explicitly specify the zero and one element cases: (match lst [(or (list) (list v)) ...]) (if you wanted and there’s no better way already, you could even stick that in a match expander)

as for lambda-list parsing, I don’t think there’s anything out of the box but it probably wouldn’t be too difficult to build as a match expander

@slack1 note that map and vector-map both take the function first because they can accept multiple lists / vectors, letting you do things like (map + (vector 1 2 3) (vector 10 20 30))

but sequence-map accepts only one sequence because a sequence can produce multiple values at once

@notjack, thanks, (or (list) (list v)) seems good