Clojure Code Snippet: Creating a Movie Genre Index

This Clojure code snippet elegantly creates a movie genre index. Starting with a map containing movie information (title, genres, and Rotten Tomatoes score), it uses the `reduce` and `zipmap` functions to categorize movies by genre, ultimately producing a map where keys are genres and values are lists of movies belonging to that genre. This index facilitates looking up movies by genre and sorting them by rating. For example, it easily allows finding all thriller movies and sorting them by their Rotten Tomatoes score. The code is concise and efficient, showcasing the elegance of functional programming.