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How to toggle a boolean value

Swift version: 5.0

Paul Hudson    @twostraws   

Swift’s booleans have a toggle() method that flip them between true and false. That might sound simple, but the end result makes for much more natural Swift code:

var loggedIn = false
loggedIn.toggle()

This is particularly useful in more complex data structures: myVar.prop1.prop2.enabled.toggle() avoids the potential typing errors that could be caused using manual negation.

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Available from iOS 8.0

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