Question

How to convert a string to title case in Rust

Answer 1

use unicode_segmentation::UnicodeSegmentation;

fn to_title_case(s: &str) -> String {
    s.split_word_bounds()
        .map(|word| {
            let mut chars = word.chars();
            match chars.next() {
                None => String::new(),
                Some(first) => first.to_uppercase().collect::<String>() + chars.as_str(),
            }
        })
        .collect()
}

fn main() {
    let s = "In the beginning there was nothing, which exploded.";
    
    let title_case = to_title_case(s);
    
    println!("{}", title_case); 
}



/*
run:

In The Beginning There Was Nothing, Which Exploded.

*/

 

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