How to find Union of Two Sets in Rust - Step by Step Examples

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How to find Union of Two Sets in Rust ?

Answer

In Rust, you can find the union of two sets using the union method provided by the standard library.

✐ Examples

1 Union of Two Sets using union Method

In this example,

We create two sets named set1 and set2.
We call the union method on set1 with set2 as an argument.
The union method combines the elements of both sets into set1.

Rust Program

fn main() {
    let mut set1 = [1, 2, 3].iter().cloned().collect::<std::collections::HashSet<_>>();
    let set2 = [3, 4, 5].iter().cloned().collect::<std::collections::HashSet<_>>();
    set1.extend(set2);
    println!("{:?}", set1);
}

Output

{1, 2, 3, 4, 5}

2 Union of Two Sets using union Method (Alternative)

In this example,

We create two sets named set1 and set2.
We use the union method provided by the HashSet struct to merge set2 into set1.

Rust Program

use std::collections::HashSet;

fn main() {
    let mut set1: HashSet<i32> = [1, 2, 3].iter().cloned().collect();
    let set2: HashSet<i32> = [3, 4, 5].iter().cloned().collect();
    set1.union(&set2);
    println!("{:?}", set1);
}

Output

{1, 2, 3, 4, 5}

Summary

In this tutorial, we learned How to find Union of Two Sets in Rust language with well detailed examples.

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