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Difference Between “==“ and “.elementEqual” | Swift | iOS

As apple document stated:

==(_:_:)

Returns a Boolean value indicating whether two arrays contain the same elements in the same order.

Then I found out about the elementsEqual(_:) that seemed the same to me, so I read it to know what the difference.

elementsEqual(_:)

Returns a Boolean value indicating whether this sequence and another sequence contain the same elements in the same order.

elementEqual is a instance method which take O(m) time complexity and with elementsEqual you can compare collections of different types such as Array, RandomAccessSlice and Set, while with == you can't do that.

let arrOfChocolate = [1, 2, 3]
let sliceOfChocolate = 1...3
let setOfChocolate: Set<Int> = [1, 2, 3] // remember that Sets are not ordered

arrOfChocolate.elementsEqual(sliceOfChocolate) // true
arrOfChocolate.elementsEqual(set) // false
arrOfChocolate == sliceOfChocolate // ERROR
arrOfChocolate == setOfChocolate // ERROR

I hope that this small piece of logic has become clear. 😊

Thank you 😄