Vec contains problem

playground.rs

fn main() {
    let array_str = ["a", "b", "c"];
    let array_string = ["a".to_string(), "b".to_string(), "c".to_string()];

    let value_str = "b";
    let value_string = String::from(value_str);

    let result_str = array_str.contains(&value_string);
    let result_string = array_string.contains(&value_str);
    let result_literal = array_string.contains("b");

    println!(
        "result: {} {} {}",
        result_str, result_string, result_literal
    );
}