---
title: Collection Implementations
framework: swift
role: collectionGroup
role_heading: API Collection
path: swift/collectiondifference/collection-implementations
---

# Collection Implementations

## Topics

### Structures

- [CollectionDifference.Index](swift/collectiondifference/index.md)

### Instance Properties

- [count](swift/collectiondifference/count.md)
- [endIndex](swift/collectiondifference/endindex.md)
- [first](swift/collectiondifference/first.md)
- [indices](swift/collectiondifference/indices-swift.property.md)
- [isEmpty](swift/collectiondifference/isempty.md)
- [startIndex](swift/collectiondifference/startindex.md)
- [underestimatedCount](swift/collectiondifference/underestimatedcount.md)

### Instance Methods

- [distance(from:to:)](swift/collectiondifference/distance(from:to:).md)
- [distance(from:to:)](swift/collectiondifference/distance(from:to:)-945d8.md)
- [drop(while:)](swift/collectiondifference/drop(while:).md)
- [dropFirst(_:)](swift/collectiondifference/dropfirst(_:).md)
- [dropLast(_:)](swift/collectiondifference/droplast(_:).md)
- [firstIndex(of:)](swift/collectiondifference/firstindex(of:).md)
- [firstIndex(where:)](swift/collectiondifference/firstindex(where:).md)
- [formIndex(_:offsetBy:)](swift/collectiondifference/formindex(_:offsetby:)-21k4b.md)
- [formIndex(_:offsetBy:limitedBy:)](swift/collectiondifference/formindex(_:offsetby:limitedby:).md)
- [formIndex(after:)](swift/collectiondifference/formindex(after:).md)
- [index(_:offsetBy:)](swift/collectiondifference/index(_:offsetby:).md)
- [index(_:offsetBy:limitedBy:)](swift/collectiondifference/index(_:offsetby:limitedby:).md)
- [index(after:)](swift/collectiondifference/index(after:).md)
- [index(of:)](swift/collectiondifference/index(of:).md)
- [indices(of:)](swift/collectiondifference/indices(of:).md)
- [indices(where:)](swift/collectiondifference/indices(where:).md)
- [makeIterator()](swift/collectiondifference/makeiterator().md)
- [map(_:)](swift/collectiondifference/map(_:)-zouk.md)
- [prefix(_:)](swift/collectiondifference/prefix(_:).md)
- [prefix(through:)](swift/collectiondifference/prefix(through:).md)
- [prefix(upTo:)](swift/collectiondifference/prefix(upto:).md)
- [prefix(while:)](swift/collectiondifference/prefix(while:).md)
- [randomElement()](swift/collectiondifference/randomelement().md)
- [randomElement(using:)](swift/collectiondifference/randomelement(using:).md)
- [removingSubranges(_:)](swift/collectiondifference/removingsubranges(_:).md)
- [split(maxSplits:omittingEmptySubsequences:whereSeparator:)](swift/collectiondifference/split(maxsplits:omittingemptysubsequences:whereseparator:).md)
- [split(separator:maxSplits:omittingEmptySubsequences:)](swift/collectiondifference/split(separator:maxsplits:omittingemptysubsequences:)-1dhc.md)
- [suffix(_:)](swift/collectiondifference/suffix(_:).md)
- [suffix(from:)](swift/collectiondifference/suffix(from:).md)

### Subscripts

- [subscript(_:)](swift/collectiondifference/subscript(_:).md)
- [subscript(_:)](swift/collectiondifference/subscript(_:)-22qdy.md)

### Type Aliases

- [CollectionDifference.Indices](swift/collectiondifference/indices.md)
- [CollectionDifference.Iterator](swift/collectiondifference/iterator.md)
- [CollectionDifference.SubSequence](swift/collectiondifference/subsequence.md)