computes a kind of sum from the values stored in the list
None
There is no guarantee in which order the values will be reduced (folded).
So the reduction function must obey to the law of assosiativity!
| std::reduce | computes a kind of sum from the items of a collection |
| std::map | applies a function to all items of a collection |
| std::map_reduce | combines a map and a reduce operation into a single operation |