public/subjects/groceries/README.md

groceries

Instructions

Create a function named insert, that inserts a new element at the end of the Vec.

Create another function named at_index that returns the value found at the index passed as an argument.

pub fn insert(vec: &mut Vec<String>, val: String) {
}

pub fn at_index(vec: &Vec<String>, index: usize) -> String {
}

Usage

Here is a possible program to test your function:

use groceries::{insert, at_index};

fn main() {
	let mut groceries = vec![
		"yogurt".to_string(),
		"panettone".to_string(),
		"bread".to_string(),
		"cheese".to_string(),
	];
	insert(&mut groceries, String::from("nuts"));
	println!("The groceries list contains {:?}", &groceries);
	println!(
		"The second element of the grocery  list is {:?}",
		at_index(&groceries, 1)
	);
}

And its output:

$ cargo run
The groceries list contains ["yogurt", "panettone", "bread", "cheese", "nuts"]
The second element of the grocery  list is "panettone"
$

Notions

• Common Collections
• Vectors