user> (use 'clojure.contrib.def)
nil
user> (defnk f [:b 43] (inc b))
#'user/f
user> (f)
44
user> (f :b 100)
101
user=> (defnk with-positional [foo :b 43] (+ foo (inc b)))
#'user/with-positional
user=> (with-positional 5 :b 1)
7

user> (use 'clojure.contrib.def)
nil
user> (defnk f [:b 43] (inc b))
#'user/f
user> (f)
44
user> (f :b 100)
101