How to Remove Duplicates in an Array in Rust - Step by Step Examples

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How to Remove Duplicates in an Array in Rust ?

Answer

To remove duplicates from an array in Rust, you can use the `iter` methods like `dedup` or `collect` with a `HashSet`.

✐ Examples

1 Remove Duplicates using iter::dedup

In this example,

We create a vector named `numbers` with duplicate integers.
We call `iter().dedup()` on the vector to remove consecutive duplicates.
Finally, we collect the unique elements into a new vector to get an array without duplicates.

Rust Program

fn main() {
    let mut numbers = vec![1, 2, 2, 3, 4, 4, 5];
    numbers.dedup();
    println!("Array without duplicates: {:?}", numbers);
}

Output

Array without duplicates: [1, 2, 3, 4, 5]

2 Remove Duplicates using collect with HashSet

In this example,

We create a vector named `colors` with duplicate strings.
We use `collect` with a `HashSet` to collect unique elements.
Finally, we convert the `HashSet` back to a vector to get an array without duplicates.

Rust Program

use std::collections::HashSet;

fn main() {
    let colors = vec!["red", "green", "blue", "green", "yellow", "blue"];
    let unique_colors: Vec<&str> = colors.into_iter().collect::<HashSet<&str>>().into_iter().collect();
    println!("Array without duplicates: {:?}", unique_colors);
}

Output

Array without duplicates: ["green", "yellow", "blue", "red"]

Summary

In this tutorial, we learned How to Remove Duplicates in an Array in Rust language with well detailed examples.

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