How to remove first and last character of a string in Rust?

Question

I'm wondering how I can remove the first and last character of a string in Rust.

Example:

Input:

"Hello World"

Output:

"ello Worl"

Answer 1

…or the trivial solution
also works with Unicode characters:

let mut s = "Hello World".to_string();
s.pop();      // remove last
s.remove(0);  // remove first

Answer 2

You can use the .chars() iterator and ignore the first and last characters:

fn rem_first_and_last(value: &str) -> &str {
    let mut chars = value.chars();
    chars.next();
    chars.next_back();
    chars.as_str()
}

It returns an empty string for zero- or one-sized strings and it will handle multi-byte unicode characters correctly. See it working on the playground.