Question

I am looking for a clojure-csv library example that uses write-csv. Specifically, how are the arguments formed? I cannot figure out why I am getting the following error below.

Here is my code example with error:

(def x [1 2 3 4]) 

(write-csv (spit "test.tmp" x) :end-of-line "\n")    

ArityException Wrong number of args (3) passed to:
      core$write-csv  clojure.lang.AFn.throwArity (AFn.java:437)

Thank You.

Answer 1

EDIT Misread your question and didn’t realize you were asking about using the library clojure-csv. Going to leave this up in case it helps anyone else using clojure.data.csv.

If you are using leiningen put the following in your project.clj file.

(defproject so "example"
  :dependencies [[org.clojure/clojure "1.3.0"]
                 [org.clojure/data.csv "0.1.2"]])

Example code of creating a function which takes a filename and the data to write to a csv.

(ns so.core
  (:require [clojure.data.csv :as csv]
            [clojure.java.io :as io]))

(defn csv [filename data]
  (with-open [f (io/writer filename)]
    (csv/write-csv f data)))

Using csv from the repl.

so.core> (csv "example.csv" [["stack" 1]
                         ["example" 40]])

And here is what example.csv looks like.

$ cat example.csv 
stack,1
example,40

Hopefully this helps out.