op.sequenceAggregate( aggColName as String, columndef as String, [options as String] ) as aggregatedef
This call constructs a sequence whose items are the values of a column for each row in the group or row set. The result is used for building the parameters used by the prototype.groupBy function.
const op = require('/MarkLogic/optic'); op.fromView('main', 'expenses') .groupBy('Category', op.sequenceAggregate("Sequence Array", "Amount")) .orderBy('Category') .result();