Question

How to remove duplicates from an array in Rust

Answer 1

use std::collections::HashSet;

fn remove_duplicates(arr: &[i32]) -> Vec<i32> {
    let set: HashSet<_> = arr.iter().cloned().collect();
    
    set.into_iter().collect()
}

fn main() {
    let array = [1, 3, 4, 3, 3, 4, 1, 1, 5, 5, 6, 7, 8, 8, 8, 8, 9];
    
    let unique_array = remove_duplicates(&array);
    
    println!("{:?}", unique_array); 
}



  
/*
run:
  
[7, 5, 1, 4, 6, 8, 3, 9]
 
*/

 

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