Returns a value wrapped to indicate that it is the final value of the reduce and transduce functions. The returned value should be considered a black box: the internal structure is not guaranteed to be stable.
Note: this optimization is unavailable to functions not explicitly listed
above. For instance, it is not currently supported by
R.reduce( (acc, item) => item > 3 ? R.reduced(acc) : acc.concat(item), , [1, 2, 3, 4, 5]) // [1, 2, 3]
The final value of the reduce.
The wrapped value.