Rust

4.8    Solutions

This section provides the code solutions for the practice exercises in Section 4.7. The code is largely self-explanatory; however, we have included comments and additional explanations wherever necessary to enhance understanding.

1. Fix the compilation error

   fn main() {    let s1: String = String::from("this is me, ");    let s2: &str = "Nouman";    some_function(&s1, s2);    println!("{} {}", s1, s2);}fn some_function(a1: &String, a2: &str) { // update the first input to a                                          // reference String    println!("{} {}", a1, a2);}  

2. Ownership in a loop

   fn main() {    let mut my_vec = vec![1, 2, 3, 4, 5];    let mut temp;    while !my_vec.is_empty() {        temp = my_vec.clone(); /* during the first iteration, the transfer of                               ownership occurs from my_vec to temp, ...