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

# BidirectionalCollection Implementations

## Topics

### Instance Properties

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

### Instance Methods

- [difference(from:)](swift/flattensequence/difference(from:).md)
- [difference(from:by:)](swift/flattensequence/difference(from:by:).md)
- [distance(from:to:)](swift/flattensequence/distance(from:to:)-1s77i.md)
- [formIndex(before:)](swift/flattensequence/formindex(before:).md)
- [formIndex(before:)](swift/flattensequence/formindex(before:)-1ghfa.md)
- [index(_:offsetBy:)](swift/flattensequence/index(_:offsetby:)-1pgap.md)
- [index(_:offsetBy:limitedBy:)](swift/flattensequence/index(_:offsetby:limitedby:)-6ctou.md)
- [index(before:)](swift/flattensequence/index(before:).md)
- [joined(separator:)](swift/flattensequence/joined(separator:)-9kr1e.md)
- [last(where:)](swift/flattensequence/last(where:).md)
- [lastIndex(of:)](swift/flattensequence/lastindex(of:).md)
- [lastIndex(where:)](swift/flattensequence/lastindex(where:).md)