Hi all,
I've been reading through clojure.core to see examples of fine clojure
style. One thing I've noticed is (what I consider) a weird notation
when parsing parameters for function. As an example, consider the
function juxt:
(defn juxt
"Alpha - name subject to change.
Takes a set of functions and returns a fn that is the juxtaposition
of those fns. The returned fn takes a variable number of args, and
returns a vector containing the result of applying each fn to the
args (left-to-right).
((juxt a b c) x) => [(a x) (b x) (c x)]"
([f]
(fn
([] [(f)])
([x] [(f x)])
([x y] [(f x y)])
([x y z] [(f x y z)])
([x y z & args] [(apply f x y z args)])))
[ rest of juxt is omitted for brevity ]
I don't understand why there needs to be a case for [x], [x y], [x y
z] and [x y z & args]. Why not just [args]? And why the magic number
(three) of variables?
Thomas
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to [email protected]
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
To unsubscribe from this group, send email to
clojure+unsubscribegooglegroups.com or reply to this email with the words
"REMOVE ME" as the subject.
