How to Copy a Set in Rust - Step by Step Examples

How to Copy a Set in Rust ?

Answer

In Rust, you can copy a set (implemented using collections like HashSet) by using the clone() method or by simply assigning it to a new variable, which performs a shallow copy.

✐ Examples

1 Copy Integer Set

In this example,

We create a HashSet named numbers containing some integer elements.
We create a new HashSet named copied_numbers by using the clone() method with numbers.
Now, copied_numbers contains a copy of all elements from numbers.

Rust Program

use std::collections::HashSet;

fn main() {
    let mut numbers = HashSet::new();
    numbers.insert(1);
    numbers.insert(2);
    numbers.insert(3);

    let copied_numbers = numbers.clone();
    println!("Copied Numbers: {:?}", copied_numbers);
}

Output

Copied Numbers: {1, 2, 3}

2 Copy String Set

In this example,

We create a HashSet named fruits containing some string elements.
We create a new HashSet named copied_fruits by simply assigning fruits to it.
Now, copied_fruits contains a copy of all elements from fruits.

Rust Program

use std::collections::HashSet;

fn main() {
    let mut fruits = HashSet::new();
    fruits.insert("Apple");
    fruits.insert("Banana");
    fruits.insert("Cherry");

    let copied_fruits = fruits;
    println!("Copied Fruits: {:?}", copied_fruits);
}

Output

Copied Fruits: {"Apple", "Cherry", "Banana"}

Summary

In this tutorial, we learned How to Copy a Set in Rust language with well detailed examples.

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