Question

How to join a vector of strings into a string in Rust

Answer 1

fn join_a_vector_of_strings_into_a_string(vec: Vec<String>) -> String {
    let mut str = String::new();
    
    for (i, s) in vec.iter().enumerate() {
        str.push_str(s);
        if i < vec.len() - 1 {
            str.push('-');
        }
    }
    
    str
}

fn main() {
    let vec = vec!["rust".to_string(), "java".to_string(), "c".to_string(), "c++".to_string()];
    
    let str = join_a_vector_of_strings_into_a_string(vec);
    
    println!("{}", str);
}

 
 
/*
run:
 
rust-java-c-c++
 
*/

 

70+ SQL courses for beginners and professionals

Answer 2

fn main() {
    let words = vec!["C", "C++", "Java", "Rust"];
    let sentence = words.join(" ");
    
    println!("{}", sentence);
}

 
 
/*
run:
 
C C++ Java Rust

*/

 

70+ SQL courses for beginners and professionals