Parse a string or vector according to the platform's conventions for the PATH environment variable and return a Vec. Drops empty paths.

Example

use std::os;

let key = "PATH";
match os::getenv(key) {
    Some(paths) => {
        for path in os::split_paths(paths).iter() {
            println!("'{}'", path.display());
        }
    }
    None => println!("{} is not defined in the environnement.", key)
}