Swift Array extension that removes duplicate elements, provided the elements conform to the Equatable protocol

RemoveDuplicates.swift

//
//  RemoveDuplicates.swift
//
//  Created by João Santos on 25/05/2020.
//  Copyright © 2020 João Santos. All rights reserved.
//

import Foundation

extension Array where Element: Equatable {
    func removingDuplicates() -> [Element] {
        var addedDict = [Element]()

        return filter {
            if addedDict.contains($0) {
                return false
            }
            addedDict.append($0)
            return true
        }
    }

    mutating func removeDuplicates() {
        self = self.removingDuplicates()
    }
}