Want this course?
Sets are incredibly useful. They give you fast containment checks and they don't remember duplicates. They're very useful for adding idempotence since duplicates are ignored.
Code is available: lispcast/clojure-collections
You can checkout the code in your local repo with this command:
$CMD git clone https://github.com/lispcast/clojure-collections.git $CMD cd clojure-collections