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update

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Declaration

@discardableResult mutating func update(with newMember: Self.Element) -> Self.Element?

Summary

Inserts the given element into the set.
If newMember is not contained in the set but subsumes current members
of the set, the subsumed members are returned.
var options: ShippingOptions = [.secondDay, .priority]
let replaced = options.update(with: .express)
print(replaced == .secondDay)
// Prints "true"

Returns

The intersection of [newMember] and the set if the
intersection was nonempty; otherwise, nil.

Parameters

Name	Type	Summary
newMember	Self.Element	-

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