#![allow(unused_imports)]
#![allow(unused_variables)]

use std::collections::HashMap;
use std::env;

// Get a users PATH, split it by ":" and print as a vector
// two approachs
fn main() {

    // using Option<T>
    if let Some(paths) = get_path_paths_as_option() {
        println!("{:?}", paths);
    }

    // vs an empty array
    let paths = get_path_paths_always_vector();
    println!("{:?}", paths);
}

fn get_path_paths_as_option() -> Option<Vec<String>> {
    let filtered_env: HashMap<String, String> = env::vars().collect();
    match filtered_env.get("PATH") {
        Some(t) => {
            Some(t.split(":")
                .map(|x| x.to_string())
                .collect())
        },
        None => None
    }
}

fn get_path_paths_always_vector() -> Vec<String> {
    let filtered_env: HashMap<String, String> = env::vars().collect();
    match filtered_env.get("PATH") {
        Some(t) => {
            t.split(":")
                .map(|x| x.to_string())
                .collect()
        },
        None => vec![]
    }
}