Shared via Rust Playground

playground.rs

fn main() {
    let floats = vec![1.0, 2.0, 3.0];
    let s: &[f64] = &floats[..];
    
    let string = s.into_iter().map(ToString::to_string).collect::<Vec<_>>().join(",");
    
    println!("{}", string);
}