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

# Collection Implementations

## Topics

### Structures

- [FlattenSequence.Index](swift/flattensequence/index.md)

### Instance Properties

- [count](swift/flattensequence/count.md)
- [endIndex](swift/flattensequence/endindex.md)
- [indices](swift/flattensequence/indices-swift.property.md)
- [isEmpty](swift/flattensequence/isempty.md)
- [startIndex](swift/flattensequence/startindex.md)

### Instance Methods

- [distance(from:to:)](swift/flattensequence/distance(from:to:).md)
- [distance(from:to:)](swift/flattensequence/distance(from:to:)-1neyu.md)
- [firstIndex(of:)](swift/flattensequence/firstindex(of:).md)
- [firstIndex(where:)](swift/flattensequence/firstindex(where:).md)
- [formIndex(_:offsetBy:)](swift/flattensequence/formindex(_:offsetby:)-9h4a8.md)
- [formIndex(_:offsetBy:limitedBy:)](swift/flattensequence/formindex(_:offsetby:limitedby:)-5809f.md)
- [formIndex(after:)](swift/flattensequence/formindex(after:).md)
- [formIndex(after:)](swift/flattensequence/formindex(after:)-7v0c1.md)
- [index(_:offsetBy:)](swift/flattensequence/index(_:offsetby:).md)
- [index(_:offsetBy:)](swift/flattensequence/index(_:offsetby:)-20r2m.md)
- [index(_:offsetBy:limitedBy:)](swift/flattensequence/index(_:offsetby:limitedby:).md)
- [index(_:offsetBy:limitedBy:)](swift/flattensequence/index(_:offsetby:limitedby:)-7gfpk.md)
- [index(after:)](swift/flattensequence/index(after:).md)
- [index(of:)](swift/flattensequence/index(of:).md)
- [indices(of:)](swift/flattensequence/indices(of:).md)
- [indices(where:)](swift/flattensequence/indices(where:).md)
- [map(_:)](swift/flattensequence/map(_:)-9pfsv.md)
- [prefix(through:)](swift/flattensequence/prefix(through:).md)
- [prefix(upTo:)](swift/flattensequence/prefix(upto:).md)
- [randomElement()](swift/flattensequence/randomelement().md)
- [randomElement(using:)](swift/flattensequence/randomelement(using:).md)
- [removingSubranges(_:)](swift/flattensequence/removingsubranges(_:).md)
- [split(separator:maxSplits:omittingEmptySubsequences:)](swift/flattensequence/split(separator:maxsplits:omittingemptysubsequences:)-9yjf5.md)
- [suffix(from:)](swift/flattensequence/suffix(from:).md)

### Subscripts

- [subscript(_:)](swift/flattensequence/subscript(_:)-1cq56.md)
- [subscript(_:)](swift/flattensequence/subscript(_:)-1eq7u.md)
- [subscript(_:)](swift/flattensequence/subscript(_:)-3w5sk.md)
- [subscript(_:)](swift/flattensequence/subscript(_:)-4nz3b.md)
- [subscript(_:)](swift/flattensequence/subscript(_:)-cutv.md)
- [subscript(_:)](swift/flattensequence/subscript(_:)-v1s4.md)

### Type Aliases

- [FlattenSequence.Indices](swift/flattensequence/indices.md)
- [FlattenSequence.SubSequence](swift/flattensequence/subsequence.md)