(chunks len src)
  len: an int
  src: an arr
  returns an iter
F

Iterates over non-overlapping sub-arrays.

Each array produced by the iterator is newly-allocated and mutable. If the length of src is not an exact multiple of len, the final array will be shorter than len.

(prn ..(chunks 2 '(0 1 2 3 4))) ; prints (0 1) (2 3) (4)
repeat-with
chunks-exact