title: List Comprehension in Ocaml?
body: <p>It seems that Ocaml batteries have comprehension syntax:
  <a href="http://en.wikipedia.org/wiki/List_comprehension#OCaml" rel="noreferrer">http://en.wikipedia.org/wiki/List_comprehension#OCaml</a></p>
  
  <p>However, what module should I include to use this syntax? I already <code>open Batteries</code>, but it doesn't work. Or is there a more idiomatic way to do list comprehension? I can use List.map and BatList.remove_if to achieve similar results, but that is much less elegant.</p>