Remove repeated values from a INT array, returning the resultant array in the same order as original. Swift implementation.

gistfile1.swift

import UIKit

var numbers = [7, 7, 7, 1, 1, 1, 2, 3, 4, 4, 5, 5, 6, 7, 7, 8, 8]
var filter = [Int]()

for number in numbers {
    if !contains(filter, number) {
        filter.append(number)
    }
}

print(filter)
// Returns [7, 1, 2, 3, 4, 5, 6, 8]