Use map to transform values inside Option/Result and and_then to chain fallible operations in Rust.
Use map to transform the inner value of an Option or Result without unwrapping, and and_then to chain operations that might fail.
let five = Some(5);
let six = five.map(|x| x + 1);
let result: Result<i32, &str> = Ok(5);
let doubled = result.and_then(|x| if x > 0 { Ok(x * 2) } else { Err("negative") });
These tools let you process values that might be missing or errors without writing repetitive if-statements. Think of map as a conveyor belt that modifies an item if it exists, and and_then as a chain of steps where the next step only happens if the previous one succeeded.