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
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74

use crate::prelude::*;
use crate::utils::NoNull;

impl<T> ChunkTakeEvery<T> for ChunkedArray<T>
where
    T: PolarsNumericType,
{
    fn take_every(&self, n: usize) -> ChunkedArray<T> {
        let mut ca = if !self.has_validity() {
            let a: NoNull<_> = self.into_no_null_iter().step_by(n).collect();
            a.into_inner()
        } else {
            self.into_iter().step_by(n).collect()
        };
        ca.rename(self.name());
        ca
    }
}

impl ChunkTakeEvery<BooleanType> for BooleanChunked {
    fn take_every(&self, n: usize) -> BooleanChunked {
        let mut ca: Self = if !self.has_validity() {
            self.into_no_null_iter().step_by(n).collect()
        } else {
            self.into_iter().step_by(n).collect()
        };
        ca.rename(self.name());
        ca
    }
}

impl ChunkTakeEvery<Utf8Type> for Utf8Chunked {
    fn take_every(&self, n: usize) -> Utf8Chunked {
        let mut ca: Self = if !self.has_validity() {
            self.into_no_null_iter().step_by(n).collect()
        } else {
            self.into_iter().step_by(n).collect()
        };
        ca.rename(self.name());
        ca
    }
}

#[cfg(feature = "dtype-binary")]
impl ChunkTakeEvery<BinaryType> for BinaryChunked {
    fn take_every(&self, n: usize) -> BinaryChunked {
        let mut ca: Self = if !self.has_validity() {
            self.into_no_null_iter().step_by(n).collect()
        } else {
            self.into_iter().step_by(n).collect()
        };
        ca.rename(self.name());
        ca
    }
}

impl ChunkTakeEvery<ListType> for ListChunked {
    fn take_every(&self, n: usize) -> ListChunked {
        let mut ca: Self = if !self.has_validity() {
            self.into_no_null_iter().step_by(n).collect()
        } else {
            self.into_iter().step_by(n).collect()
        };
        ca.rename(self.name());
        ca
    }
}

#[cfg(feature = "object")]
impl<T: PolarsObject> ChunkTakeEvery<ObjectType<T>> for ObjectChunked<T> {
    fn take_every(&self, _n: usize) -> ObjectChunked<T> {
        todo!()
    }
}