Keys

利用可能

Returns the keys of an association (optionally wrapping each with a head)

形式

Keys[<| key1 -> val1, key2 -> val2, … |>]

Keys[{key1 -> val1, key2 -> val2, …}]

Keys[expr, h]

検証済みの例myHash = <|"Green" -> 2, "Red" -> 1|>; Keys[myHash] → {Green, Red}

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トピック

Associations - Elements of Associations
Computation With Structured Datasets - Explicit Parts of Datasets
Evaluation Control - Manipulating Unevaluated Expressions
Language Overview - Associations »
New In100 Alphabetical Listing - K
New In100 Core Language And Structure - Associations »

関連

Values Association Rule KeyMemberQ KeyFreeQ KeySort KeySortBy KeyMap KeyValueMap KeySelect KeyTake KeyDrop

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