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Graham Lee 9ead8781d4 Add .docc catalog to publish stdlib docs on swift.org

Co-authored-by: Alex Martini <amartini@apple.com>
Co-authored-by: Graham Lee <glee23@apple.com>
Co-authored-by: Chris Adamson <cadamson@apple.com>
Co-authored-by: Kirby Turner <kirby_turner@apple.com>
Co-authored-by: Paris Pinkney <ppinkney@apple.com>
Co-authored-by: Dave Spector <dspector@apple.com>
Co-authored-by: Sofia Rodriguez Morales <sofia_rodriguez@apple.com>
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2026-04-10 10:04:56 -04:00

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`Swift/Dictionary`

Topics

Creating a Dictionary

In addition to using a dictionary literal, you can also create a dictionary using these initializers.

Swift/Dictionary/init()
Swift/Dictionary/init(minimumCapacity:)
Swift/Dictionary/init(uniqueKeysWithValues:)
Swift/Dictionary/init(_:uniquingKeysWith:)
Swift/Dictionary/init(grouping:by:)
Swift/Dictionary/init(_:)

Inspecting a Dictionary

Swift/Dictionary/isEmpty-11b2w
Swift/Dictionary/count-1s9fd
Swift/Dictionary/capacity

Accessing Keys and Values

Swift/Dictionary/subscript(_:)-8rfql
Swift/Dictionary/subscript(_:default:)
Swift/Dictionary/index(forKey:)
Swift/Dictionary/subscript(_:)-4bhoo
Swift/Dictionary/keys-swift.property
Swift/Dictionary/values-swift.property
Swift/Dictionary/first
Swift/Dictionary/randomElement()
Swift/Dictionary/randomElement(using:)
Swift/Dictionary/init(dictionaryLiteral:)
Swift/Dictionary/init(_:)
Swift/Dictionary/indices

Adding Keys and Values

Swift/Dictionary/updateValue(_:forKey:)
Swift/Dictionary/merge(_:uniquingKeysWith:)-m2ub
Swift/Dictionary/merge(_:uniquingKeysWith:)-7smbb
Swift/Dictionary/merging(_:uniquingKeysWith:)-3vtfs
Swift/Dictionary/merging(_:uniquingKeysWith:)-9bik6
Swift/Dictionary/reserveCapacity(_:)

Removing Keys and Values

Swift/Dictionary/filter(_:)
Swift/Dictionary/removeValue(forKey:)
Swift/Dictionary/remove(at:)
Swift/Dictionary/removeAll(keepingCapacity:)

Comparing Dictionaries

Swift/Dictionary/==(_:_:)
Swift/Dictionary/!=(_:_:)

Iterating over Keys and Values

Swift/Dictionary/forEach(_:)
Swift/Dictionary/enumerated()
Swift/Dictionary/lazy
Swift/Dictionary/makeIterator()
Swift/Dictionary/underestimatedCount-4ggro

Finding Elements

Swift/Dictionary/contains(where:)
Swift/Dictionary/allSatisfy(_:)
Swift/Dictionary/first(where:)
Swift/Dictionary/firstIndex(where:)
Swift/Dictionary/min(by:)
Swift/Dictionary/max(by:)
Swift/Dictionary/indices
Swift/Dictionary/Element

Transforming a Dictionary

Swift/Dictionary/mapValues(_:)
Swift/Dictionary/reduce(_:_:)
Swift/Dictionary/reduce(into:_:)
Swift/Dictionary/compactMap(_:)
Swift/Dictionary/compactMapValues(_:)
Swift/Dictionary/flatMap(_:)-i3ly
Swift/Dictionary/flatMap(_:)-6chv9
Swift/Dictionary/sorted(by:)
Swift/Dictionary/shuffled()
Swift/Dictionary/shuffled(using:)

Performing Collection Operations

doc:order-dependent-operations-on-dictionary

Encoding and Decoding

Swift/Dictionary/encode(to:)
Swift/Dictionary/init(from:)-6e6js

Describing a Dictionary

Swift/Dictionary/description
Swift/Dictionary/debugDescription
Swift/Dictionary/customMirror
Swift/Dictionary/hash(into:)

Supporting Types

Swift/Dictionary/Keys-swift.struct
Swift/Dictionary/Values-swift.struct
Swift/Dictionary/Index
Swift/Dictionary/Iterator
Swift/Dictionary/Element

Infrequently Used Functionality

Swift/Dictionary/init(dictionaryLiteral:)

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Swift/Dictionary