map takes a function and a collection. So, that function can be: 1. named: - define the function on it own, using the defn macro - pass it as first argument to map
(def coll [[1 2] [3 4] [4 5]]) (defn foo [x y] (println x y)) (map foo coll) 2. anonymous: - use shorthand notation #(...) -- for one argument function, % represents the argument -- for multiple args, use %1, %2, %3, etc., which represent arg in specified position - use the fn special form (fn [x y] ...) - specify these inline in map call (def coll [[1 2] [3 4] [4 5]]) (map #(println %1 %2) coll) (map (fn [x y] (println x y)) coll) On Tue, Jun 28, 2011 at 2:58 PM, octopusgrabbus <octopusgrab...@gmail.com>wrote: > Given this sample: > > (ns test-csv > (:gen-class) > (:use clojure.contrib.command-line) > (:use clojure-csv.core)) > > (defn x1 > [val1 val2] > (println val1 val2)) > > (defn process-file > "Process csv file and prints a column in every row" > [file-name] > (let [data (slurp file-name) > rows (parse-csv data)] > (dorun (map #(println ( nth % 11 nil)) rows)))) > > (defn -main [& args] > (with-command-line args > "Get csv file name" > [[file-name ".csv file name" "resultset.csv"]] > [[file-name ".csv file name" 1]] > (println "file-name:", file-name) > (process-file file-name))) > > I would like to print out two or more values, or creating a vector of > those values would be helpful. I have been experimenting, but either > get errors or nothing printed out. > > I am just not sure how to approach this. > Thanks. > cmn > > -- > 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 -- 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