How to Access Items in a Set in Rust

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How to Access Items in a Set in Rust ?

Answer

In Rust, you can access items in a set using iteration or specific methods provided by the HashSet data structure.

✐ Examples

1 Access Items in a Set using Iteration

In this example,

We create a HashSet named string_set containing strings.
We use a for loop to iterate over the elements in the set and print each element.

Rust Program

use std::collections::HashSet;

fn main() {
    let mut string_set = HashSet::new();
    string_set.insert("Apple");
    string_set.insert("Banana");
    string_set.insert("Orange");
    string_set.insert("Grapes");

    for item in &string_set {
        println!("{:?}", item);
    }
}

Output

Apple
Banana
Orange
Grapes

2 Access Items in a Set using Specific Methods

In this example,

We create a HashSet named number_set containing integers.
We use the len() method to get the number of elements in the set.
We use the contains() method to check if an item exists in the set.

Rust Program

use std::collections::HashSet;

fn main() {
    let mut number_set = HashSet::new();
    number_set.insert(1);
    number_set.insert(2);
    number_set.insert(3);
    number_set.insert(4);

    println!("Number of elements: {:?}", number_set.len());
    println!("Does set contain 3? {:?}", number_set.contains(&3));
}

Output

Number of elements: 4
Does set contain 3? true

Summary

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

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How to Access Items in a Set in Rust

How to Access Items in a Set in Rust ?

Answer

✐ Examples

1 Access Items in a Set using Iteration

Rust Program

Output

2 Access Items in a Set using Specific Methods

Rust Program

Output

Summary

More Rust Sets Tutorials