RegexPattern.Options.intersection(_:)

This example uses the intersection(_:) method to limit the available shipping options to what can be used with a PO Box destination.

// Can only ship standard or priority to PO Boxes let poboxShipping: ShippingOptions = [.standard, .priority] let memberShipping: ShippingOptions = [.standard, .priority, .secondDay]

let availableOptions = memberShipping.intersection(poboxShipping) print(availableOptions.contains(.priority)) // Prints "true" print(availableOptions.contains(.secondDay)) // Prints "false"

• Parameter other: An option set.
• Returns: A new option set with only the elements contained in both this set and other.