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• 16:15, 31 January 2024 Marshall talk contribs created page Group (Created page with ":''This page is about the K primitive that returns a dictionary. For the primitive that returns an array introduced by BQN, see Group (BQN).'' {{Built-in|Group|<nowiki>=</nowiki>}} is a monadic function in K that returns a dictionary whose keys are the unique values in its argument and whose value for a given key is the list of indices where it appears. In versions before K4, which introduced dictionaries, Group returns only an array of the index lis...")