# ``Swift/Set``

## Topics

### Creating a Set

In addition to using an array literal, you can also create a set using these initializers.

- ``Swift/Set/init()``
- ``Swift/Set/init(minimumCapacity:)``
- ``Swift/Set/init(_:)-9cgks``
- ``Swift/Set/init(_:)-15hys``

### Inspecting a Set

- ``Swift/Set/isEmpty-207wt``
- ``Swift/Set/count-8ze93``
- ``Swift/Set/capacity``

### Testing for Membership

- ``Swift/Set/contains(_:)``

### Adding Elements

- ``Swift/Set/insert(_:)-nads``
- ``Swift/Set/insert(_:)-yar4``
- ``Swift/Set/update(with:)-2n6tk``
- ``Swift/Set/update(with:)-7r2g``
- ``Swift/Set/reserveCapacity(_:)``

### Removing Elements

- ``Swift/Set/filter(_:)``
- ``Swift/Set/remove(_:)-8p2tv``
- ``Swift/Set/remove(_:)-4d3i1``
- ``Swift/Set/removeFirst()``
- ``Swift/Set/remove(at:)``
- ``Swift/Set/removeAll(keepingCapacity:)``

### Combining Sets

- ``Swift/Set/union(_:)``
- ``Swift/Set/formUnion(_:)``
- ``Swift/Set/intersection(_:)-1zh8f``
- ``Swift/Set/intersection(_:)-6uts9``
- ``Swift/Set/formIntersection(_:)``
- ``Swift/Set/symmetricDifference(_:)``
- ``Swift/Set/formSymmetricDifference(_:)-22p0m``
- ``Swift/Set/formSymmetricDifference(_:)-5u38b``
- ``Swift/Set/subtract(_:)-8gc48``
- ``Swift/Set/subtract(_:)-7cd3y``
- ``Swift/Set/subtracting(_:)-3n4lc``
- ``Swift/Set/subtracting(_:)-2qge3``

### Comparing Sets

- ``Swift/Set/==(_:_:)``
- ``Swift/Set/!=(_:_:)``
- ``Swift/Set/isSubset(of:)-1d7pp``
- ``Swift/Set/isSubset(of:)-6qyo5``
- ``Swift/Set/isStrictSubset(of:)-96vc3``
- ``Swift/Set/isStrictSubset(of:)-787sx``
- ``Swift/Set/isSuperset(of:)-9iz62``
- ``Swift/Set/isSuperset(of:)-90hri``
- ``Swift/Set/isStrictSuperset(of:)-4d27m``
- ``Swift/Set/isStrictSuperset(of:)-58ejg``
- ``Swift/Set/isDisjoint(with:)-8ngmk``
- ``Swift/Set/isDisjoint(with:)-2onid``

### Accessing Individual Elements

- ``Swift/Set/first``
- ``Swift/Set/randomElement()``
- ``Swift/Set/randomElement(using:)``

### Finding Elements

- ``Swift/Set/subscript(_:)``
- ``Swift/Set/contains(where:)``
- ``Swift/Set/allSatisfy(_:)``
- ``Swift/Set/first(where:)``
- ``Swift/Set/firstIndex(of:)``
- ``Swift/Set/firstIndex(where:)``
- ``Swift/Set/index(of:)``
- ``Swift/Set/min()``
- ``Swift/Set/min(by:)``
- ``Swift/Set/max()``
- ``Swift/Set/max(by:)``

### Transforming a Set

- ``Swift/Set/compactMap(_:)``
- ``Swift/Set/flatMap(_:)-i3my``
- ``Swift/Set/flatMap(_:)-6chuh``
- ``Swift/Set/reduce(_:_:)``
- ``Swift/Set/reduce(into:_:)``
- ``Swift/Set/sorted()``
- ``Swift/Set/sorted(by:)``
- ``Swift/Set/shuffled()``
- ``Swift/Set/shuffled(using:)``
- ``Swift/Set/lazy``

### Iterating over a Set

- ``Swift/Set/enumerated()``
- ``Swift/Set/forEach(_:)``
- ``Swift/Set/makeIterator()``
- ``Swift/Set/underestimatedCount-4ggqw``

### Performing Collection Operations

- <doc:order-dependent-operations-on-set>

### Encoding and Decoding

- ``Swift/Set/encode(to:)``
- ``Swift/Set/init(from:)``

### Describing a Set

- ``Swift/Set/hash(into:)``
- ``Swift/Set/description``
- ``Swift/Set/debugDescription``
- ``Swift/Set/customMirror``

### Supporting Types

- ``Swift/Set/Index``
- ``Swift/Set/Iterator``

### Infrequently Used Functionality

- ``Swift/Set/init(arrayLiteral:)-3uja4``
- ``Swift/Set/withContiguousStorageIfAvailable(_:)``