Array extension for swift language usable in iOS to filter/remove duplicated elements based on a predicate

Array+RemoveDuplicates.swift

/// Remove duplicated elements
extension Array {

	/// mutate array by iterating through element and filtering duplicated ones
	/// - parameter predicate: the test to check if two elements are a dulication
	public mutating func removeDuplicates(_ predicate: (Element, Element) -> Bool) {
		self = removeDuplicates(predicate)
	}

	/// iterating through element and filtering duplicated ones
	/// - parameter predicate: the test to check if two elements are a dulication
	public func removeDuplicates(_ predicate: (Element, Element) -> Bool) -> [Element] {
		var result = [Element]()
		for value in self {
			if !result.contains(where: { elem -> Bool in
				predicate(value, elem)
			}) {
				result.append(value)
			}
		}
		return result
	}
}

extension Array where Element: Equatable {
	
	/// Remove duplicated elements where array is equatable
    public mutating func removeDuplicates() {
        var result = [Element]()
        for value in self {
            if !result.contains(value) {
                result.append(value)
            }
        }
        self = result
    }
}