on Thu Oct 13 2016, Tim Vermeulen <swift-users-AT-swift.org> wrote: > Is it a requirement that collections share indices with its > subsequence?
Yes. > Array and ArraySlice do share indices, which is why ArraySlice isn’t > zero-based, and I think this is convenient. But String.CharacterView > doesn’t seem to share indices with its subsequence (which is > String.CharacterView as well). That's a bug. > Consider this example: > > let foo = "foobar".characters > > let index = foo.index(foo.startIndex, offsetBy: 3) > let bar = foo.suffix(from: index) // "bar" > > foo[index] // "b" :) > foo[bar.startIndex] // "f" :( > > So does this mean that we can’t assume that collections and their > subsequences share their indices (which could be very handy), or is > this just a bug related to String.CharacterView? The latter. -- -Dave _______________________________________________ swift-users mailing list [email protected] https://lists.swift.org/mailman/listinfo/swift-users
