rust-by-practice/en/src/compound-types/tuple.md

Tuple

1. 🌟 Elements in a tuple can have different types. Tuple's type signature is (T1, T2, ...), where T1, T2 are the types of tuple's members.

fn main() {
    let _t0: (u8,i16) = (0, -1);
    // Tuples can be tuple's members
    let _t1: (u8, (i16, u32)) = (0, (-1, 1));
    // fill the blanks to make the code work
    let t: (u8, __, i64, __, __) = (1u8, 2u16, 3i64, "hello", String::from(", world"));

    println!("Success!")
}

2. 🌟 Members can be extracted from the tuple using indexing.

// make it works
fn main() {
   let t = ("i", "am", "sunface");
   assert_eq!(t.1, "sunface");

   println!("Success!")
}

3. 🌟 Long tuples cannot be printed

// fix the error
fn main() {
    let too_long_tuple = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13);
    println!("too long tuple: {:?}", too_long_tuple);
}

4. 🌟 Destructuring tuple with pattern.

fn main() {
    let tup = (1, 6.4, "hello");

    // fill the blank to make the code work
    let __ = tup;

    assert_eq!(x, 1);
    assert_eq!(y, "hello");
    assert_eq!(z, 6.4);

    println!("Success!")
}

5. 🌟🌟 Destructure assignments.

fn main() {
    let (x, y, z);

    // fill the blank
    __ = (1, 2, 3);
    
    assert_eq!(x, 3);
    assert_eq!(y, 1);
    assert_eq!(z, 2);

    println!("Success!")
}

6. 🌟🌟 Tuples can be used as function arguments and return values

fn main() {
   // fill the blank, need a few computations here.
   let (x, y) = sum_multiply(__);

   assert_eq!(x, 5);
   assert_eq!(y, 6);

   println!("Success!")
}

fn sum_multiply(nums: (i32, i32)) -> (i32, i32) {
    (nums.0 + nums.1, nums.0 * nums.1)
}

You can find the solutions here(under the solutions path), but only use it when you need it