These are from algebra.Monoid
Returns an instance of T
calculated by summing all instances in
iter
in one pass.
Returns an instance of T
calculated by summing all instances in
iter
in one pass. Returns None
if iter
is empty, else
Some[T]
.
instances of T
to be combined
None
if iter
is empty, else an option value containing the summed T
Compacting monoid for batched values.
This monoid ensures that the batch's tree structure has fewer than
batchSize
values in it. When more values are added, the tree is compacted usingm
.