> On Oct 17, 2017, at 11:47 AM, Michael Ilseman via swift-evolution
> <swift-evolution@swift.org> wrote:
>
> `==` conveys substitutability of the two Sequences. This does not necessarily
> entail anything about their elements, how those elements are ordered, etc.,
> it just means two Sequences are substitutable. `elementsEqual` means that the
> two Sequences produce substitutable elements. These are different concepts
> and both are independently useful.
I agree that ‘==‘ conveys substitutability. Here is the issue:
let a = Set([1,2,3,4,5])
let b = Set([5,4,3,2,1])
a == b //True, they are substitutable
[1,2,3,4,5].elementsEqual(a) //True
[1,2,3,4,5].elementsEqual(b) //False… I guess they weren’t actually
substitutable after all
Thanks,
Jon_______________________________________________
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