vec_string/
lib.rs

1pub trait VecString{
2    fn vec_string(&self) -> String;
3    fn vec_string_inner(&self) -> String;
4}
5
6/// Get string of Vec<T> where T: Display
7impl<T> VecString for Vec<T> where T: std::fmt::Display{
8    /// assert_eq!("[1, 2, 3]", vec![1, 2, 3].vec_string());
9    fn vec_string(&self) -> String{
10        format!("[{}]", self.vec_string_inner())
11    }
12
13    /// assert_eq!("1, 2, 3", vec![1, 2, 3].vec_string());
14    fn vec_string_inner(&self) -> String{
15        let mut string = String::new();
16        for x in self{
17            string.push_str(&format!("{}, ", x));
18        }
19        string.pop();
20        string.pop();
21        string
22    }
23}
24
25#[cfg(test)]
26mod tests {
27    use crate::VecString;
28
29    #[test]
30    fn it_works() {
31        assert_eq!(2 + 2, 4);
32    }
33
34    #[test]
35    fn test() {
36        assert_eq!("[1, 2, 3]", vec![1, 2, 3].vec_string());
37        assert_eq!("1, 2, 3", vec![1, 2, 3].vec_string_inner());
38    }
39}
vec_string/lib.rs

vec_string/
lib.rs
