# RegexPattern.Options.intersection(_:)

- **Module:** RegexPattern.Options
- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** method
- **Page:** https://libtmux.org/reference/swift/regexpattern-options-intersection(_-)/

```
RegexPattern.Options.intersection(_:)(other: Self) -> Self
```

Returns a new option set with only the elements contained in both this set and the given set.

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`.