Author Archive | Nick Samoylov

why classical music is not as popular as some other music genres? Well, many classical venues are packed, but pop music is called so for the reason - it IS most popular.

Everything is moving and changing all the time. Why? What drives the change?

We come to this world and assume it to be a stable one, with clear binary classification. Then one reads Wittgenstein or something similar and discovered the lies at the foundation of their world view. Then what?

The Collectors.teeing() collects stream elements twice concurrently, produces two results, and then uses the specified function to merge them into one final object.

The Collectors.collectingAndThen() allows collect the stream elements and add another (finishing) transformation to the result. It is especially useful for creating multi-level groups using Collectors.groupingBy() or Collectors.partitioningBy().

The Collectors.toUnmodifiableList/Set/Map() collectors create corresponding unmodifiable (elements cannot be added o removed) structure. That is why such a collector especially useful for creating multi-level groups using Collectors.groupingBy() or Collectors.partitioningBy().

The Collectors.filtering() collector does two things at the same time: selects (filters) some of stream element and collects the results into one structure. That is why such a collector especially useful for creating multi-level groups using Collectors.groupingBy() or Collectors.partitioningBy().

The Collectors.reducing() collector does two things at the same time: transforms each stream element and collects the results into one structure. That is why such a collector especially useful for creating multi-level groups using Collectors.groupingBy() or Collectors.partitioningBy().

The Collectors.flatMapping() collector does two things at the same time: transforms each element into a stream of values and assembles the result. That is why such a collector especially useful as a parameter when a collector is created by Collectors.groupingBy() or Collectors.partitioningBy().

The Collectors.mapping() collector does two things at the same time: transforms each element and assembles the results. That is why such a collector especially useful as a parameter when a collector is created by Collectors.groupingBy() or Collectors.partitioningBy().