Question

How to convert an array of integers to a string in Rust

Answer 1

fn convert_array_of_integers_to_string(arr: &[i32]) -> String {
    let mut result = String::new();
    
    for &num in arr {
        result.push_str(&num.to_string());
        result.push(' ');
    }
    
    result.trim_end().to_string() // Remove the trailing space
}

fn main() {
    let arr = [5, 8, 12, 800, 3907];
    
    let s = convert_array_of_integers_to_string(&arr);
    
    println!("{}", s);
}


   
   
/*
run:
   
5 8 12 800 3907
   
*/

 

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Answer 2

fn convert_array_of_integers_to_string(arr: &[i32]) -> String {
    let result = arr.iter().map(|x| x.to_string()).collect::<String>();

    result
}

fn main() {
    let arr = [5, 8, 12, 800, 3907];
    
    let s = convert_array_of_integers_to_string(&arr);
    
    println!("{}", s);
}


   
   
/*
run:
   
58128003907
   
*/

 

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