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A way to easily compare a given value against an array of candidates
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| import Foundation | |
| struct EquatableValueSequence<T: Equatable> { | |
| static func ==(lhs: EquatableValueSequence<T>, rhs: T) -> Bool { | |
| return lhs.values.contains(rhs) | |
| } | |
| static func ==(lhs: T, rhs: EquatableValueSequence<T>) -> Bool { | |
| return rhs == lhs | |
| } | |
| fileprivate let values: [T] | |
| } | |
| func any<T: Equatable>(of values: T...) -> EquatableValueSequence<T> { | |
| return EquatableValueSequence(values: values) | |
| } | |
| let string = "Three" | |
| // Instead of multiple conditions like this: | |
| if string == "One" || string == "Two" || string == "Three" { | |
| } | |
| // You can now do: | |
| if string == any(of: "One", "Two", "Three") { | |
| } |
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