Question

This is a very short question.

I have a ParIterable collection and I want to convert it “back” into Iterable. Is that possible?

Answer 1

The corresponding ScalaDoc says:

Methods:

def seq: Sequential
def par: Repr

produce the sequential or parallel implementation of the collection,
respectively. Method par just returns a reference to this parallel
collection. Method seq is efficient – it will not copy the elements.
Instead, it will create a sequential version of the collection using
the same underlying data structure. Note that this is not the case for
sequential collections in general – they may copy the elements and
produce a different underlying data structure.

The combination of methods toMap, toSeq or toSet along with par and
seq is a flexible way to change between different collection types.