mirror of
https://github.com/rust-lang/rustlings.git
synced 2024-12-30 17:26:28 +00:00
46 lines
869 B
Rust
46 lines
869 B
Rust
// move_semantics3.rs
|
|
// Make me compile without adding new lines-- just changing existing lines!
|
|
// (no lines with multiple semicolons necessary!)
|
|
// Scroll down for hints :)
|
|
|
|
pub fn main() {
|
|
let vec0 = Vec::new();
|
|
|
|
let mut vec1 = fill_vec(vec0);
|
|
|
|
println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
|
|
|
|
vec1.push(88);
|
|
|
|
println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
|
|
|
|
}
|
|
|
|
fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
|
|
vec.push(22);
|
|
vec.push(44);
|
|
vec.push(66);
|
|
|
|
vec
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// The difference between this one and the previous ones is that the first line
|
|
// of `fn fill_vec` that had `let mut vec = vec;` is no longer there. You can,
|
|
// instead of adding that line back, add `mut` in one place that will change
|
|
// an existing binding to be a mutable binding instead of an immutable one :)
|