[swift-users] Was the String contains(_:) method changed in Swift 4?

[Quinn "The Eskimo!"]

On 8 Nov 2017, at 08:47, Martin R via swift-users <swift-users at swift.org> wrote:

> but apparently only if Foundation is imported.

Which isn’t a huge surprise when you consider how tricky string containment is.

import Foundation

// U+00DF LATIN SMALL LETTER SHARP S

let s = "Friedrichstra\u{df}e"
let ss = "strasse"
if s.contains(s) {
    print("It's a street!")
}

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