How to Map and Reduce Items From a List in Java

Mapping items from a List means that each item from that List will be converted into another object.  Reducing items from a List means that all items from that List will be combined into a single object, which doesn’t necessarily have the same type as the original ones.

Let’s say we have a List of Orders and each order has a List of Products.

from DZone.com Feed https://ift.tt/3mExSD4