Question

How to extract uppercase characters (capital letters) from a string in Rust

Answer 1

fn main() {
    let s = "wRUdSpqTzao";
    
    let uppercase_chars: Vec<char> = s.chars().filter(|ch| ch.is_uppercase()).collect();
    
    println!("{:?}", uppercase_chars);
}


 
 
/*
run:
 
['R', 'U', 'S', 'T']
 
*/

 

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