Community lambdas.

Copyable definitions. Tested. Tagged. Star the ones you use.

Name	Signature	Description	Tags	★
PIVOT.MELT	(table, id_cols)	Unpivot a wide table into a tall one. Keeps id columns, melts everything else into name/value rows.	reshape, array	412
BYROW.IF	(array, predicate)	Filter rows of a 2D array using a row-wise lambda. Equivalent to BYROW + FILTER, but eager.	array	87