Learn Rust in a Month of Lunches

6 More collections, more error handling

This chapter covers

• Other collections—more complex and interesting ones this time
• The question mark operator—just type ? to handle errors
• When panic and unwrap are good

Rust has a lot more collection types than the ones we learned in chapter 3. You might not need all of them right away, but be sure to give each collection type a read so that you’ll remember when you might need each one of them. This chapter also introduces one of Rust’s most loved operators: ? (Yes, it’s just a question mark.)

6.1 Other collections

Rust has many more types of collections besides the ones we learned in chapter 3. All of them are contained in the same spot: the std::collections module in the standard library. The best way ...