Returns a vector of the items in coll for which
(pred item) returns true. pred must be free of side-effects.
Source
(defnfilterv"Returns a vector of the items in coll for which\n (pred item) returns true. pred must be free of side-effects."[predcoll](->(reduce(fn[vo](if(predo)(conj!vo)v))(transient[])coll)persistent!))