<!--
{
  "availability" : [
    "iOS: 16.0.0 -",
    "iPadOS: 16.0.0 -",
    "macCatalyst: 16.0.0 -",
    "macOS: 13.0.0 -",
    "tvOS: 16.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 9.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "Swift",
  "identifier" : "/documentation/Swift/BidirectionalCollection/contains(_:)-1l08t",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "Swift"
    ],
    "preciseIdentifier" : "s:SK17_StringProcessingSs11SubSequenceRtzrlE8containsySbqd__AA14RegexComponentRd__lF"
  },
  "title" : "contains(_:)"
}
-->

# contains(_:)

Returns a Boolean value indicating whether the collection contains the
given regex.

```
func contains(_ regex: some RegexComponent) -> Bool
```

## Parameters

`regex`

A regex to search for within this collection.

## Return Value

`true` if the regex was found in the collection, otherwise
`false`.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)