Many thanks. I didn't recognize the % symbol is used similarly to the way it's used in printf and constructing SQL query string.
On Jun 17, 9:07 am, Ken Wesson <kwess...@gmail.com> wrote: > On Fri, Jun 17, 2011 at 8:57 AM, octopusgrabbus > > <octopusgrab...@gmail.com> wrote: > > I'm trying this in REPL > > > timmy=> (def ox [1 2 3 4]) > > #'timmy/ox > > timmy=> ox > > [1 2 3 4] > > timmy=> (map #(reduce str/split (seq ox) #",")) > > java.lang.IllegalArgumentException: Wrong number of args (1) passed > > to: core$map (NO_SOURCE_FILE:0) > > t > > Yikes. > > Well, first of all, you need to > > (map #(str/split % #",") some-seq-of-strings) > > -- map takes a function and then one or more sequences or collections > to iterate over. Further, the function needs to have an argument; with > #() closures you use % to stand in for the element from the sequence. > So > > (map #(* 2 %) ox) > > in your case would return > > (2 4 6 8) > > as a lazy sequence. > > Lastly, though, ox doesn't contain strings so str/split can't be used > on them. And I don't know why you had a "reduce" in there. > > -- > Protege: What is this seething mass of parentheses?! > Master: Your father's Lisp REPL. This is the language of a true > hacker. Not as clumsy or random as C++; a language for a more > civilized age. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
