Combines two T
instances associatively.
Combines two T
instances associatively.
result of combining l
and r
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
Returns the identity element of T
for plus.
Returns the identity element of T
for plus.
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
.