splitting by white space or multiple white spaces

To split a string in Rust by white space or multiple white spaces, you can use the split_whitespace method provided by the str type. This method returns an iterator over the substrings in the given string, splitting at each occurrence of white space, and skipping any leading or trailing white space.

Here's an example code snippet that demonstrates how to use split_whitespace:

fn main() {
    let my_string = "Hello     world    Rust   ";

    let substrings: Vec<&str> = my_string.split_whitespace().collect();

    for substring in substrings {
        println!("{}", substring);
    }
}

In this example, the string my_string contains multiple spaces between the words. The split_whitespace method is called on my_string, and the resulting iterator is collected into a vector of substrings. Then, each substring is printed using a loop.

When you run this code, the output will be:

Hello
world
Rust

This shows that the string has been split into three substrings, with the extra white spaces removed.

I hope this helps! Let me know if you have any further questions.