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README.md | 2 years ago |
README.md
Highest
Instructions
In this exercise, a Numbers
struct will be given.
These methods have to be written for it:
new
: create a new instance ofNumber
.List
: which returns anarray
with every number in the struct.Latest
: which returns anOption<u32>
with the last added number.Highest
: which returns anOption<u32>
with the highest number from the list.Highest_Three
: which returns aVec<u32>
with the three highest numbers.
Expected functions
pub fn new(&[u32]) -> Self {}
pub fn list(&self) -> &[u32] {}
pub fn latest(&self) -> Option<u32> {}
pub fn highest(&self) -> Option<u32> {}
pub fn highest_three(&self) -> Vec<u32> {}
Usage
Here is a program to test your function.
use highest::*;
#[derive(Debug)]
struct Numbers<'a> {
numbers: &'a [u32],
}
fn main() {
let expected = [30, 500, 20, 70];
let n = Numbers::new(&expected);
println!("{:?}", n.list());
println!("{:?}", n.highest());
println!("{:?}", n.latest());
println!("{:?}", n.highest_three());
}
And its output:
$ cargo run
[30, 500, 20, 70]
Some(500)
Some(70)
[500, 70, 30]
$