itermap 0.4.0

Iterator tools for maps (`HashMap`, `BTreeMap`, etc.)
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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153

mod keys;
mod values;

pub use keys::FilterKeys;
pub use values::FilterValues;

#[cfg(test)]
mod test {
    use std::collections::{HashMap, HashSet};

    use map_vec::{Map, Set};
    use pretty_assertions::assert_eq;

    use crate::IterMap;

    #[test]
    fn hash() {
        let map = HashMap::from([
            ('a', HashSet::from([1, 2, 3])),
            ('b', HashSet::from([4, 5, 6])),
            ('c', HashSet::from([7, 8, 9])),
        ]);

        let expected = map
            .clone()
            .remove_entry(&'b')
            .into_iter()
            .collect::<HashMap<_, _>>();

        let filtered = map
            .clone()
            .into_iter()
            .filter_keys(|c| c == &'b')
            .collect::<HashMap<_, _>>();
        assert_eq!(expected, filtered);
        println!("{filtered:#?}");

        let filtered = map
            .into_iter()
            .filter_values(|v| v.contains(&5))
            .collect::<HashMap<_, _>>();
        assert_eq!(expected, filtered);
        println!("{filtered:#?}");
    }

    #[test]
    fn hash_ref() {
        let map = HashMap::from([
            ('a', HashSet::from([1, 2, 3])),
            ('b', HashSet::from([4, 5, 6])),
            ('c', HashSet::from([7, 8, 9])),
        ]);

        let expected = map
            .get_key_value(&'b')
            .into_iter()
            .collect::<HashMap<_, _>>();

        let filtered = map
            .iter()
            .filter_keys(|c| c == &&'b')
            .collect::<HashMap<_, _>>();
        assert_eq!(expected, filtered);
        println!("{filtered:#?}");

        let filtered = map
            .iter()
            .filter_values(|v| v.contains(&5))
            .collect::<HashMap<_, _>>();
        assert_eq!(expected, filtered);
        println!("{filtered:#?}");
    }

    #[test]
    fn map() {
        let map = Map::from_iter([
            ('a', Set::from_iter([1, 2, 3])),
            ('b', Set::from_iter([4, 5, 6])),
            ('c', Set::from_iter([7, 8, 9])),
        ]);

        let expected = map.get_key_value(&'b').into_iter().collect::<Map<_, _>>();

        let filtered = map
            .iter()
            .filter_keys(|c| c == &&'b')
            .collect::<Map<_, _>>();
        assert_eq!(expected, filtered);
        println!("{filtered:#?}");

        let filtered = map
            .iter()
            .filter_values(|v| v.contains(&5))
            .collect::<Map<_, _>>();
        assert_eq!(expected, filtered);
        println!("{filtered:#?}");
    }

    #[test]
    fn vec() {
        let vec = Vec::from([('a', 'A'), ('b', 'B'), ('c', 'C')]);

        let expected = vec
            .iter()
            .find(|(k, _v)| k == &'b')
            .cloned()
            .into_iter()
            .collect::<Vec<_>>();

        let filtered = vec
            .clone()
            .into_iter()
            .filter_keys(|k| k == &'b')
            .collect::<Vec<_>>();
        assert_eq!(expected, filtered);
        println!("{filtered:#?}");

        let filtered = vec
            .into_iter()
            .filter_values(|v| v == &'B')
            .collect::<Vec<_>>();
        assert_eq!(expected, filtered);
        println!("{filtered:#?}");
    }

    #[test]
    fn vec_ref() {
        let vec = Vec::from([('a', 'A'), ('b', 'B'), ('c', 'C')]);

        let expected = vec
            .iter()
            .find(|(k, _v)| k == &'b')
            .map(|(k, v)| (k, v))
            .into_iter()
            .collect::<Vec<_>>();

        let filtered = vec
            .iter()
            .map(|(k, v)| (k, v))
            .filter_keys(|k| k == &&'b')
            .collect::<Vec<_>>();
        assert_eq!(expected, filtered);
        println!("{filtered:#?}");

        let filtered = vec
            .iter()
            .map(|(k, v)| (k, v))
            .filter_values(|v| v == &&'B')
            .collect::<Vec<_>>();
        assert_eq!(expected, filtered);
        println!("{filtered:#?}");
    }
}