Solution for exercise 9.6.1: Use references to a Dynamically Sized Slice instead of references to a Fixed-Size Array. #2848
Description
The following functions get references to a fixed-size array:
Don't think this is the best solution, especially after slices have just been discussed. The better option IMO would be to pass slices instead:
fn magnitude(vector: &[f64]) -> f64 {
// ...
}
fn normalize(vector: &mut [f64]) {
// ...
}That way the functions accept any-dimensional vectors, e.g.
fn main() {
println!(
"Magnitude of a unit vector: {}",
magnitude(&[0.0, 1.0, 0.0])
);
let mut v = [1.0, 2.0, 9.0];
println!("Magnitude of {v:?}: {}", magnitude(&v));
normalize(&mut v);
println!("Magnitude of {v:?} after normalization: {}", magnitude(&v));
let mut v4 = [1.0, 2.0, 3.0, 4.0];
println!("4d vector: {v4:?}");
normalize(&mut v4);
println!("Normalized 4d vector: {v4:?}");
}