Rust Programming 2023 - A Comprehensive Course for Beginners - What Are HashMaps in Rust

The video tutorial introduces Rust's standard collection library, focusing on hash maps. It explains the concept of hash maps as a data structure for storing key-value pairs, highlighting their usefulness in scenarios where data lookup by key is needed. The tutorial covers various methods associated with hash maps, such as insert, length, get, iterate, and remove. An example is provided to demonstrate how to create and manipulate a hash map in Rust, including adding and removing entries. The lesson concludes with a practical application and a preview of future exercises.

What happens if you try to insert a duplicate key into a hash map?

Describe how to insert a new key-value pair into a hash map in Rust.

How do you retrieve the size of a hash map in Rust?