removeDuplicateDataArray.swift

/
//  ViewController.swift
//  For Test Part 4
//
//  Created by Jeri P.M on 10/09/18.
//  Copyright © 2018 Jeri P.M . All rights reserved.
//

import UIKit

class SecsionLastVC: UIViewController {
    
    var dataArray = ["a","a","a","b","b","c","c","e","f","c"]
    var dataTab: [String] = []

    override func viewDidLoad() {
        super.viewDidLoad()
        
        for items in dataArray {
            
            dataTab.append(items)
            print(dataTab)
            
        }

        dataTab.removeDuplicates()
        print(dataTab)
    }
    
}

extension Array where Element: Hashable {
    func removingDuplicates() -> [Element] {
        var addedDict = [Element: Bool]()
        
        return filter {
            addedDict.updateValue(true, forKey: $0) == nil
        }
    }
    
    mutating func removeDuplicates() {
        self = self.removingDuplicates()
    }
}