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

# Collection Implementations

## Topics

### Instance Properties

- [count](swift/arrayslice/count.md)
- [first](swift/arrayslice/first.md)
- [isEmpty](swift/arrayslice/isempty.md)
- [underestimatedCount](swift/arrayslice/underestimatedcount.md)

### Instance Methods

- [drop(while:)](swift/arrayslice/drop(while:).md)
- [dropFirst(_:)](swift/arrayslice/dropfirst(_:).md)
- [firstIndex(of:)](swift/arrayslice/firstindex(of:).md)
- [firstIndex(where:)](swift/arrayslice/firstindex(where:).md)
- [formIndex(_:offsetBy:)](swift/arrayslice/formindex(_:offsetby:).md)
- [formIndex(_:offsetBy:limitedBy:)](swift/arrayslice/formindex(_:offsetby:limitedby:).md)
- [index(of:)](swift/arrayslice/index(of:).md)
- [indices(of:)](swift/arrayslice/indices(of:).md)
- [indices(where:)](swift/arrayslice/indices(where:).md)
- [makeIterator()](swift/arrayslice/makeiterator().md)
- [map(_:)](swift/arrayslice/map(_:)-5ink0.md)
- [popFirst()](swift/arrayslice/popfirst().md)
- [prefix(_:)](swift/arrayslice/prefix(_:).md)
- [prefix(through:)](swift/arrayslice/prefix(through:).md)
- [prefix(upTo:)](swift/arrayslice/prefix(upto:).md)
- [prefix(while:)](swift/arrayslice/prefix(while:).md)
- [randomElement()](swift/arrayslice/randomelement().md)
- [randomElement(using:)](swift/arrayslice/randomelement(using:).md)
- [removeFirst()](swift/arrayslice/removefirst()-m0co.md)
- [removeFirst(_:)](swift/arrayslice/removefirst(_:)-7hplr.md)
- [removingSubranges(_:)](swift/arrayslice/removingsubranges(_:).md)
- [split(maxSplits:omittingEmptySubsequences:whereSeparator:)](swift/arrayslice/split(maxsplits:omittingemptysubsequences:whereseparator:).md)
- [split(separator:maxSplits:omittingEmptySubsequences:)](swift/arrayslice/split(separator:maxsplits:omittingemptysubsequences:)-c3jd.md)
- [suffix(from:)](swift/arrayslice/suffix(from:).md)

### Subscripts

- [subscript(_:)](swift/arrayslice/subscript(_:)-2l9zt.md)
- [subscript(_:)](swift/arrayslice/subscript(_:)-4bx21.md)
- [subscript(_:)](swift/arrayslice/subscript(_:)-4x3qz.md)

### Type Aliases

- [ArraySlice.Iterator](swift/arrayslice/iterator.md)
- [ArraySlice.SubSequence](swift/arrayslice/subsequence.md)