How to convert lazy sequence to non-lazy in Clojure

Question

I tried the following in Clojure, expecting to have the class of a non-lazy sequence returned:

(.getClass (doall (take 3 (repeatedly rand))))

Answer 1

This is to some degree a question of taxonomy. a lazy sequence is just one type of sequence as is a list, vector or map. So the answer is of course "it depends on what type of non lazy sequence you want to get:
Take your pick from:

• an ex-lazy (fully evaluated) lazy sequence (doall ... )
• a list for sequential access (apply list (my-lazy-seq)) OR (into () ...)
• a vector for later random access (vec (my-lazy-seq))
• a map or a set if you have some special purpose.

You can have whatever type of sequence most suites your needs.