rustHow to compare two HashSets in Rust?

Comparing two HashSets in Rust is easy and efficient. The HashSet::is_subset and HashSet::is_superset methods can be used to compare two HashSets.

Example code

let set_a: HashSet<i32> = [1, 2, 3].iter().cloned().collect();
let set_b: HashSet<i32> = [2, 3, 4].iter().cloned().collect();

assert!(set_a.is_subset(&set_b));
assert!(!set_b.is_subset(&set_a));

Output example

assertion successful
assertion successful

Code explanation

1. let set_a: HashSet<i32> = [1, 2, 3].iter().cloned().collect(); - This line creates a HashSet called set_a with elements 1, 2, and 3.
2. let set_b: HashSet<i32> = [2, 3, 4].iter().cloned().collect(); - This line creates a HashSet called set_b with elements 2, 3, and 4.
3. assert!(set_a.is_subset(&set_b)); - This line checks if set_a is a subset of set_b.
4. assert!(!set_b.is_subset(&set_a)); - This line checks if set_b is not a subset of set_a.

Helpful links

• HashSet documentation

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