* Intro This library provides a language for expressing data manipulations as the composition of more primitive operations. #+BEGIN_SRC lisp DATA-LENS> (funcall (on (alexandria:compose (over (transform-tail (over (slice 1)))) (compress-runs :collector 'combine-matching-lists)) (alexandria:compose (over (juxt (element 0) 'identity)) (sorted 'char< :key (element 0)))) '("January" "February" "March" "April" "May" "June" "July" "August" "September" "October" "November" "December")) #| ==> ((#\A "pril" "ugust") (#\D "ecember") (#\F "ebruary") (#\J "anuary" "une" "uly") (#\M "arch" "ay") (#\N "ovember") (#\O "ctober") (#\S "eptember")) |# #+END_SRC