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

# BidirectionalCollection Implementations

## Topics

### Instance Properties

- [last](swift/substring/unicodescalarview/last.md)

### Instance Methods

- [difference(from:)](swift/substring/unicodescalarview/difference(from:).md)
- [difference(from:by:)](swift/substring/unicodescalarview/difference(from:by:).md)
- [dropLast(_:)](swift/substring/unicodescalarview/droplast(_:).md)
- [formIndex(before:)](swift/substring/unicodescalarview/formindex(before:).md)
- [index(before:)](swift/substring/unicodescalarview/index(before:).md)
- [last(where:)](swift/substring/unicodescalarview/last(where:).md)
- [lastIndex(of:)](swift/substring/unicodescalarview/lastindex(of:).md)
- [lastIndex(where:)](swift/substring/unicodescalarview/lastindex(where:).md)
- [popLast()](swift/substring/unicodescalarview/poplast()-7f9to.md)
- [removeLast()](swift/substring/unicodescalarview/removelast()-8b12x.md)
- [removeLast(_:)](swift/substring/unicodescalarview/removelast(_:)-4vtt6.md)
- [reversed()](swift/substring/unicodescalarview/reversed().md)
- [suffix(_:)](swift/substring/unicodescalarview/suffix(_:).md)