Question

How to check if a string contains identical digits in Rust

Answer 1

use std::collections::HashSet;

fn is_string_contain_identical_digits(s: &str) -> bool {
    let set: HashSet<_> = s.chars().collect();
    
    set.len() == 1
}

fn main() {
    let str = "8888888";

    if is_string_contain_identical_digits(str) {
        println!("yes");
    } else {
        println!("no");
    }
}




/*
run:

yes

*/

 

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