rust replace characters

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Henri
21 Jan 2020
1let s:String = "Hello, world!".chars()
2    .map(|x| match x { 
3        '!' => '?', 
4        'A'..='Z' => 'X', 
5        'a'..='z' => 'x',
6        _ => x
7    }).collect();
8println!("{}", s);// Xxxxx, xxxxx?
9// Avoids using Regex
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