Thanks. I've followed most of what you've written except how the symbol col fits into this, unless you're using it as map values.
On Jun 28, 3:11 pm, Mark Rathwell <mark.rathw...@gmail.com> wrote: > 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
