rustHow to merge hashsets in Rust

Hashsets in Rust can be merged using the union method. This method takes two hashsets as arguments and returns a new hashsets containing all the elements from both the hashsets.

Code example:

let mut hs1 = HashSet::new();
hs1.insert(1);
hs1.insert(2);
hs1.insert(3);

let mut hs2 = HashSet::new();
hs2.insert(3);
hs2.insert(4);
hs2.insert(5);

let hs3 = hs1.union(&hs2);

println!("{:?}", hs3);

Output

HashSet { 1, 2, 3, 4, 5 }

Explanation:

• let mut hs1 = HashSet::new();: This line creates a new hashsets called hs1
• hs1.insert(1);: This line inserts the element 1 into the hashsets hs1
• let mut hs2 = HashSet::new();: This line creates a new hashsets called hs2
• hs2.insert(3);: This line inserts the element 3 into the hashsets hs2
• let hs3 = hs1.union(&hs2);: This line creates a new hashsets called hs3 which contains all the elements from both the hashsets hs1 and hs2
• println!("{:?}", hs3);: This line prints the contents of the hashsets hs3

Helpful links:

• Rust Documentation - HashSet
• Rust Documentation - union

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