---
title: BidirectionalCollection Implementations
framework: swift
role: collectionGroup
role_heading: API Collection
path: swift/unsafebufferpointer/bidirectionalcollection-implementations
---

# BidirectionalCollection Implementations

## Topics

### Instance Properties

- [last](swift/unsafebufferpointer/last.md)

### Instance Methods

- [difference(from:)](swift/unsafebufferpointer/difference(from:).md)
- [difference(from:by:)](swift/unsafebufferpointer/difference(from:by:).md)
- [dropLast(_:)](swift/unsafebufferpointer/droplast(_:)-7845q.md)
- [formIndex(before:)](swift/unsafebufferpointer/formindex(before:).md)
- [index(before:)](swift/unsafebufferpointer/index(before:).md)
- [joined(separator:)](swift/unsafebufferpointer/joined(separator:)-5do07.md)
- [last(where:)](swift/unsafebufferpointer/last(where:).md)
- [lastIndex(of:)](swift/unsafebufferpointer/lastindex(of:).md)
- [lastIndex(where:)](swift/unsafebufferpointer/lastindex(where:).md)
- [reversed()](swift/unsafebufferpointer/reversed()-3wn4o.md)
- [suffix(_:)](swift/unsafebufferpointer/suffix(_:)-3w6qn.md)