fn   collection  &key  key   initial-value   from-end   end   start  )collection is a Lisp sequence, this simply calls cl:reduce (q.v.).:start, :end, and :from-end keywords arecollection is a seq.| reduce functionbag | 
| reduce functionseq | 
| reduce functionset | 
| reduce symbolbag | 
| reduce symbolseq | 
| reduce symbolset | 
| reduce tsequence |