Discussion on: Daily Challenge #224 - Password Validator

[Mihail Malo]

Rust

fn validize(pwd: &str) -> bool {
    if !(3..=20).contains(&pwd.len()) {
        return false;
    }
    let mut alph = false;
    let mut num = false;
    for c in pwd.chars() {
        match c {
            '0'..='9' => num = true,
            'a'..='z' | 'A'..='Z' => alph = true,
            _ => return false,
        }
    }
    alph && num
}

// usage
fn main() {
    let t = |pwd| println!("{} => {}", pwd, validize(pwd));
    t("Username");
    t("IsThisPasswordTooLong");
    t("DEVCommunity");
    t("Username123!");
    t("123");
    t("Username123");
}

Imperative, because two predicates of any and one of all would be three iterations, and that is simply not acceptable.
The lambda is only a lambda to save lines on the internet. Don't do such things.
Look at it go.