How do I replace specific characters idiomatically in Rust?

Question

So I have the string \"Hello World!\" and want to replace the \"!\" with \"?\" so that the new string is \"Hello World?\"

In Ruby we can do this easily with the gs

Answer 1

Also you can use iterators and match expression:

let s:String = "Hello, world!".chars()
    .map(|x| match x { 
        '!' => '?', 
        'A'..='Z' => 'X', 
        'a'..='z' => 'x',
        _ => x
    }).collect();
println!("{}", s);// Xxxxx, xxxxx?