Key

可用

Operator form for extracting values from associations by key

形式

Key[key]

Key[key][assoc]

验证过的示例<|a -> b, c -> d|>[[Key[a]]] → b {<|a -> x, b -> {y, z}|>, w}[[1, Key[b], 2]] → z

在 Qurak 上运行搜索参考

主题

Associations - Associations and Parts
Function Composition And Operator Forms - Rearranging Functional Forms
New In100 Alphabetical Listing - K
New In100 Core Language And Structure - Associations »
Summary Of New Features In142 - Tabular Objects »
Summary Of New Features In142 - Tabular Objects »

相关

Part Association Tabular Keys KeyExistsQ KeyDrop KeyTake Discard Drop KeySort KeyUnion MaximalBy

全部 6300 个函数 · 从 MCP 客户端使用