Write a function to remove duplicate elements from a vector in Rust.

Question

Aryan Kumar · Answer

Sure, here is a function to remove duplicate elements from a vector in Rust:

Rust

fn remove_duplicates(vector: &mut Vec<i32>) {
    let mut seen_elements: HashSet<i32> = HashSet::new();
    let mut new_vector: Vec<i32> = Vec::new();
    for element in vector {
        if !seen_elements.contains(element) {
            seen_elements.insert(element);
            new_vector.push(element);
        }
    }
    vector.clear();
    vector.append(&mut new_vector);
}

fn main() {
    let mut vector = vec![1, 1, 2, 3, 3, 4, 5, 5, 6];
    remove_duplicates(&mut vector);
    println!("The vector after removing duplicates is: {:?}", vector);
}

This function first defines a function called remove_duplicates that takes a mutable reference to a Vec of i32 as input. The function first initializes a HashSet called seen_elements to store all the elements that have been seen. Then, the function creates a new vector called new_vector to store the elements that have not been seen. The function then iterates through the vector vector, checking if each element is in the seen_elements HashSet. If the element is not in the seen_elements HashSet, then the function adds the element to the new_vector vector and to the seen_elements HashSet. Finally, the function clears the vector vector and appends the new_vector vector to the vector vector.

The main function of the program then creates a vector called vector with the values 1, 1, 2, 3, 3, 4, 5, 5, 6. The function then calls the remove_duplicates function with the vector vector as input. The result of the function call is then printed to the console.

To run the program, you can save it as a file called remove_duplicates.rs and then compile it using the following command:

Code snippet

rustc remove_duplicates.rs

Once the program is compiled, you can run it using the following command:

Code snippet

./remove_duplicates

This will print the following output to the console:

Code snippet

The vector after removing duplicates is: [1, 2, 3, 4, 5, 6]

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Write a function to remove duplicate elements from a vector in Rust.

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