// *** before: ***
// the middle of a slice could not be named in a pattern
let parts: Vec<&str> = line.split(' ').collect();
if parts.len() >= 2 {
let first = parts[0];
let last = parts[parts.len() - 1];
println!("{} {}", first, last);
}
// *** in version 1.42: ***
match parts.as_slice() {
[only] => println!("one: {}", only),
[first, .., last] => println!("{} {}", first, last),
[] => println!("empty"),
}
// the middle can be bound as well
if let [head, tail @ ..] = parts.as_slice() {
println!("{} and {} more", head, tail.len());
}