---
title: "init(capacity:copying:)"
framework: Swift
role: symbol
role_heading: Initializer
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+, tvOS 27.0+, visionOS 27.0+, watchOS 27.0+]
path: "swift/uniquearray/init(capacity:copying:)-5tkhn"
---

# init(capacity:copying:)

Creates a new array with the specified initial capacity, holding a copy of the contents of a given sequence.

## Declaration

```swift
init(capacity: Int? = nil, copying contents: some Sequence<Element>)
```

## Parameters

- `capacity`: The storage capacity of the new array, or nil to allocate just enough capacity to store the contents.
- `contents`: The sequence whose contents to copy into the new array.