ju_tcs_tbop_24_clappy/
lib.rs

1use std::{fs::read_to_string, path::Path};
2
3pub fn head(path: &Path, n: usize) -> Vec<String> {
4    read_to_string(path)
5        .unwrap()
6        .lines()
7        .take(n)
8        .map(String::from)
9        .collect()
10}
11
12pub fn tail(path: &Path, n: usize) -> Vec<String> {
13    read_to_string(path)
14        .unwrap()
15        .lines()
16        .rev()
17        .take(n)
18        .map(String::from)
19        .collect::<Vec<String>>()
20        .iter()
21        .rev()
22        .map(String::from)
23        .collect()
24}
25
26#[cfg(test)]
27mod tests {
28    use std::path::Path;
29
30    #[test]
31    fn test_head() {
32        let head = crate::head(Path::new("basic.txt"), 3);
33        let mut expected = Vec::new();
34        expected.push("a");
35        expected.push("b");
36        expected.push("c");
37        assert_eq!(head, expected);
38    }
39
40    #[test]
41    fn test_tail() {
42        let tail = crate::tail(Path::new("basic.txt"), 3);
43        let mut expected = Vec::new();
44        expected.push("d");
45        expected.push("e");
46        expected.push("f");
47        assert_eq!(tail, expected);
48    }
49}
ju_tcs_tbop_24_clappy/lib.rs

ju_tcs_tbop_24_clappy/
lib.rs
