Lecture 7: Functional Programming with Closures and Iterators

Reminders

• Homework 2 was graded -- if you still have questions about your grade that you want me to look into, please let me know and direct me to the GitHub feedback thread!

• Homework 3 here. Due date delayed to Monday, April 5 (will announce on Piazza)

  • Remember to email before the deadline to use late days (either the 4 freebies or additional late days) -- so that we make sure to delay grading your assignment.

  • Remember to run cargo clippy and cargo fmt

• Final project team choices also due April 5 -- see Piazza.

Outline of lecture

Closures (March 25)

Closures are functions with a captured set of variables to evaluate them. Closures are very powerful and allow functional programming in Rust using the Fn trait. We will discuss:

• How to write closures;

• How to write functions taking functions as arguments;

• The Fn trait for function types; and

• The useful impl Trait syntax.

Iterators (April 1)

The Iterator trait is a very powerful feature in Rust that lets you define objects that can be iterated over in a for loop. We will discuss:

• How to use iterators to write concise, clean code in Rust;

• How to define iterators for your own data types, using the Iterator and IntoIterator traits.