[swift-users] Swift 4 "Cannot use mutating member on immutable value: 'self' is immutable"

[Quinn "The Eskimo!"]

On 18 Sep 2017, at 13:52, Vladimir.S <svabox at gmail.com> wrote:

> Can't understand/accept this, sorry.

You seem to be very invested in how Swift /should/ work, rather than how it /does/ work.  I’m sympathetic with that position but it’s really a topic of conversation for swift-evolution rather than swift-users.

> Also, could you clarify, why .removeFirst() is different?

`removeFirst()` is marked as O(n), and thus it’s fully expected that it’d work on `Array`.

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Quinn "The Eskimo!"                    <http://www.apple.com/developer/>
Apple Developer Relations, Developer Technical Support, Core OS/Hardware