Class Aggregate

  • All Implemented Interfaces:
    Callable, Function, GroundedValue, Item, Sequence
    Direct Known Subclasses:
    Empty, Exists

    public abstract class Aggregate
    extends SystemFunction
    This abstract class provides functionality common to the sum(), avg(), count(), exists(), and empty() functions. These all take a sequence as input and produce a singleton as output; and they are all independent of the ordering of the items in the input.
    • Constructor Detail

      • Aggregate

        public Aggregate()