The Ultimate Guide to Rust Programming/

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Borrowing a String

Borrowing a String

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A better solution to the above problem is to modify greet to take a reference.

Exercise Get rid of the .clone() method call, and modify greet to accept a &String parameter. Then fix the calls to the greet function in main.

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fn greet(name: String) {
    println!("Hello {}", name);
}
fn main() {
    let first_name = "Michael";
    let last_name = " Snoyman";
    let full_name: String = first_name.to_owned() + last_name;
    greet(full_name.clone());
    greet(full_name);
}

That’s all well and good, but let’s make our example a little more involved. Now we want to greet a few different people:

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fn greet(name: &String) {
    println!("Hello {}", name);
}
fn main() {
    let snoyman: &str = " Snoyman";
    let michael: String = "Michael".to_owned() + snoyman;
    let miriam: String = "Miriam".to_owned() + snoyman;
    let alice: &str = "Alice Smith";
    greet(&michael);
    greet(&miriam);
    greet(alice);
}

Both michael and miriam ...