FWIW, I think most of the time it’s actually better to extend SequenceType rather than Array. I can’t think of many cases (for common code I would write), where an extension would be solely applicable to the Array type, and not all sequences (i.e. also array slices, etc.)
I would love to see this feature if it is possible. You can’t currently create an extension on Array<Double> so a common work-around is to add your functionality to SequenceType where you constrain the Generator’s Element to be of type Double - this means I’ve added functionality in places beyond where it belongs.
Daniel
>
> Can you please add these features in Swift 3?
>
> 1. The ability to do this:
> extension Array<Double> {
> //extend arrays of doubles
> }
>
— Radek
···
> On Dec 7, 2015, at 6:40 AM, Tuur Anton via swift-evolution <swift-evolution at swift.org <https://lists.swift.org/mailman/listinfo/swift-evolution>> wrote: