Rust Programming 2023 - A Comprehensive Course for Beginners - Exercise - Build a Hash Table with HashMap in Rust

The video tutorial guides viewers through an exercise on building a hash table using Hashmap in Rust. It begins with creating a new Hashmap instance and inserting key-value pairs for bar drinks. The exercise involves setting values to indicate stock levels and removing an item from the Hashmap using code. The instructor encourages viewers to attempt the exercise independently before reviewing the solution together.

Describe the process to remove 'whiskey' from the Hashmap.

What is the overall goal of the exercise described?