gluesql_utils/
hashmap.rs

1use std::{collections::HashMap, hash::Hash};
2
3pub trait HashMapExt<K, V, I> {
4    fn concat(self, entries: I) -> Self;
5}
6
7impl<K, V, I> HashMapExt<K, V, I> for HashMap<K, V>
8where
9    K: Hash + Eq,
10    I: Iterator<Item = (K, V)>,
11{
12    fn concat(mut self, entries: I) -> Self {
13        for (key, value) in entries {
14            self.insert(key, value);
15        }
16
17        self
18    }
19}
20
21#[cfg(test)]
22mod tests {
23    use {super::HashMapExt, std::collections::HashMap};
24
25    #[test]
26    fn concat() {
27        let values: HashMap<&str, i64> = [("a", 10), ("b", 20)].into();
28        let new_items = [("c", 30), ("d", 40), ("e", 50)];
29
30        let actual = values.concat(new_items.into_iter());
31        let expected = [("a", 10), ("b", 20), ("c", 30), ("d", 40), ("e", 50)].into();
32
33        assert_eq!(actual, expected);
34    }
35}
gluesql_utils/hashmap.rs

gluesql_utils/
hashmap.rs
