@zendevil The clojure contribution process doesn't work through Github PRs.

Besides this, I think your implementation is wrong. Did you run the tests? E.g. this is incorrectly returning nil in your implementation:

(get-in [{:a 1}] [0 :a])

@puredanger Perhaps it's good to set up a PR template that explains this, as it occurs quite often that people still post PRs here.

You're right about the incorrect behavior of this version of get-in, but it does pass all the tests in the master branch.

For Clojure issues, please ask questions at https://ask.clojure.org. If you'd like to contribute patches, further see the process at https://clojure.org/dev/dev#_becoming_a_contributor