Performs a reduction over a dataset, with the dataset partitioned by the
result of the bucket MapFuncCore. So, rather than many-to-one, this is many-to-fewer.
bucket partitions the values into buckets based on the result of the
expression, reducers applies the provided reduction to each expression,
and repair finally turns those reduced expressions into a final value.
ReduceIndex is guaranteed to be a valid index into reducers.
Performs a reduction over a dataset, with the dataset partitioned by the result of the bucket MapFuncCore. So, rather than many-to-one, this is many-to-fewer.
bucket
partitions the values into buckets based on the result of the expression,reducers
applies the provided reduction to each expression, and repair finally turns those reduced expressions into a final value.ReduceIndex is guaranteed to be a valid index into
reducers
.