How to check if a Set contains all the items of Another Set in Rust

How to check if a Set contains all the items of Another Set in Rust ?

Answer

To check if a Set contains all the items of another Set in Rust, you can use the HashSet data structure.


✐ Examples

1 Check if Set Contains All Items

In this example,

  1. We create two HashSet instances named set1 and set2.
  2. We iterate over each item in set2 and check if it exists in set1.
  3. If any item from set2 is not found in set1, then set1 does not contain all items of set2.
  4. Finally, we print the result to the console.

Rust Program

use std::collections::HashSet;

fn main() {
    // Define Sets with items
    let set1: HashSet<_> = [1, 2, 3, 4, 5].iter().cloned().collect();
    let set2: HashSet<_> = [2, 3].iter().cloned().collect();

    // Check if set1 contains all items of set2
    let contains_all = set2.iter().all(|&item| set1.contains(&item));

    // Print result
    println!("Does set1 contain all items of set2? {}", contains_all);
}

Output

Does set1 contain all items of set2? true

2 Check if Set Does Not Contain All Items

In this example,

  1. We create two HashSet instances named set1 and set2.
  2. We iterate over each item in set2 and check if it exists in set1.
  3. If any item from set2 is not found in set1, then set1 does not contain all items of set2.
  4. Finally, we print the result to the console.

Rust Program

use std::collections::HashSet;

fn main() {
    // Define Sets with items
    let set1: HashSet<_> = [1, 2, 3, 4, 5].iter().cloned().collect();
    let set2: HashSet<_> = [2, 6].iter().cloned().collect();

    // Check if set1 contains all items of set2
    let contains_all = set2.iter().all(|&item| set1.contains(&item));

    // Print result
    println!("Does set1 contain all items of set2? {}", contains_all);
}

Output

Does set1 contain all items of set2? false

Summary

In this tutorial, we learned How to check if a Set contains all the items of Another Set in Rust language with well detailed examples.


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