1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
pub fn rle<T>(a: &[T]) -> Vec<(T, usize)>
where
T: PartialEq + Clone,
{
let n = a.len();
let mut res = vec![];
if n == 0 {
return res;
}
let mut cnt = 1;
for i in 0..n - 1 {
if a[i] == a[i + 1] {
cnt += 1;
} else {
res.push((a[i].clone(), cnt));
cnt = 1;
}
}
res.push((a[n - 1].clone(), cnt));
res
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test() {
let s = "abbbbaaac".chars().collect::<Vec<_>>();
assert_eq!(rle(&s), [('a', 1), ('b', 4), ('a', 3), ('c', 1)]);
}
}