Use **Trait Bound** to implement a generic find largest function. Referenced from https://doc.rust-lang.org/book/ch10-02-traits.html

use-trait-bound-to-implement-generic-find_largest.rs

fn find_largest_1<T: PartialOrd + Copy>(list: &[T]) -> T {
    let mut largest = list[0];

    for number in list {
        if *number > largest {
            largest = *number;
        }
    }

    largest
}

fn find_largest_2<T: PartialOrd + Clone>(list: &[T]) -> T {
    let mut largest = list[0].clone();

    for number in list {
        if *number > largest {
            largest = number.clone();
        }
    }

    largest
}

fn find_largest_3<T: PartialOrd>(list: &[T]) -> &T {
    let mut largest = &list[0];

    for item in list.iter() {
        if *item > *largest {
            largest = item;
        }
    }

    largest
}

fn main() {
    let list = vec![34, 50, 25, 100, 65];

    println!("The largest one is {}", find_largest_1(&list));

    let list = vec!["a", "ab", "abc"];

    println!("The largest one is {}", find_largest_2(&list));

    let list = vec!["a", "ab", "abc"];

    println!("The largest one is {}", find_largest_3(&list));
}