Rust Slices and Tuples

A slice is a view of part of a collection, written &v[1..3]. It borrows rather than copies. Tuples group values of different types.

ExampleRust

fn first_word(s: &str) -> &str {
    s.split(' ').next().unwrap_or("")
}

fn min_max(v: &[i32]) -> (i32, i32) {
    (*v.iter().min().unwrap(), *v.iter().max().unwrap())
}

fn main() {
    let numbers = [10, 20, 30, 40, 50];
    let middle = &numbers[1..4];
    println!("{:?} {}", middle, middle.len());

    println!("{}", first_word("hello brave world"));

    let (lo, hi) = min_max(&numbers);
    println!("{} {}", lo, hi);

    let person = ("Ada", 36, true);
    println!("{} is {} ({})", person.0, person.1, person.2);
}

Output

[20, 30, 40] 3
hello
10 50
Ada is 36 (true)

Quick check

What is a slice?

A borrowed view of part of a collectionA copy of a vectorA kind of loop

Finish the quick check (and any code exercise) to complete this lesson, or mark it done yourself.

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