On Thu, May 7, 2015 at 10:27 AM, Francesco Ariis <fa-ml@ariis.it> wrote:
  then XS.modify >nbsp; LeftScreen . getLeftScreen . (++ [wk])

Actually, not quite.

   then XS.modify $ LeftScreen . (++ [wk]) . getLeftScreen

(they also asked in IRC and I answered it there, for the record)

--
brandon s allbery kf8nh                               sine nomine associates
allbery.b@gmail.com                                  ballbery@sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net