slicetools 0.3.0

Add extra iterators to slices.
Documentation 
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
75
76
77
78
79
80

use super::{GroupMut, GroupByMut, GroupByKeyMut};
use ::StreamerMut;

/* GroupMut */

#[test]
fn slice_with_0_item() {
    let input: &mut [i32] = &mut [];
    let mut it = GroupMut::new(input);
    
    assert!(it.next().is_none());
}

#[test]
fn slice_with_1_item() {
    let input = &mut [0];
    let mut it = GroupMut::new(input);

    assert_eq!(it.next(), Some(&mut [0][..]));
    assert_eq!(it.next(), None);
}

#[test]
fn slice_with_unique_items() {
    let input = &mut [0, 1, 2];
    let mut it = GroupMut::new(input);

    assert_eq!(it.next(), Some(&mut [0][..]));
    assert_eq!(it.next(), Some(&mut [1][..]));
    assert_eq!(it.next(), Some(&mut [2][..]));
    assert_eq!(it.next(), None);
}

#[test]
fn slice_with_one_item_type() {
    let input = &mut [0, 0, 0, 0];
    let mut it = GroupMut::new(input);

    assert_eq!(it.next(), Some(&mut [0, 0, 0, 0][..]));
    assert_eq!(it.next(), None);
}

#[test]
fn slice_with_various_groups() {
    let input = &mut [0, 0, 1, 2, 2, 2];
    let mut it = GroupMut::new(input);

    assert_eq!(it.next(), Some(&mut [0, 0][..]));
    assert_eq!(it.next(), Some(&mut [1][..]));
    assert_eq!(it.next(), Some(&mut [2, 2, 2][..]));
    assert_eq!(it.next(), None);
}

/* GroupByMut */

#[test]
fn version_with_closure_condition() {
    let input = &mut [0_i32, -1, -2, 2, 2, 2];
    let mut it = GroupByMut::new(input, |&a, &b| b.signum() == a.signum());

    assert_eq!(it.next(), Some(&mut [0][..]));
    assert_eq!(it.next(), Some(&mut [-1, -2][..]));
    assert_eq!(it.next(), Some(&mut [2, 2, 2][..]));
    assert_eq!(it.next(), None);
}

/* GroupByKeyMut */

#[derive(Debug, PartialEq)]
struct Pair(i32, i32);

#[test]
fn version_with_closure_key() {
    let input = &mut [Pair(0, 0), Pair(0, 1), Pair(0, 2), Pair(1, 0), Pair(1, 1)];
    let mut it = GroupByKeyMut::new(input, |a| a.0);

    assert_eq!(it.next(), Some(&mut [Pair(0, 0), Pair(0, 1), Pair(0, 2)][..]));
    assert_eq!(it.next(), Some(&mut [Pair(1, 0), Pair(1, 1)][..]));
    assert_eq!(it.next(), None);
}