Hi, Am 16.08.2011 um 17:26 schrieb Thomas:
> I have been struggling with this, hopefully, simple problem now for > quite sometime, What I want to do is: > > *) read a file line by line > *) modify each line > *) write it back to a different file > > This is a bit of sample code that reproduces the problem: > > ========================================================== > (def old-data (line-seq (reader "input.txt"))) > > (defn change-line > [i] > (str i " added stuff")) > > (spit "output.txt" (map change-line old-data)) > ========================================================== > #cat "output.txt" > clojure.lang.LazySeq@58d844f8 > > Because I get the lazy sequence I think I have to force the execution? > but where > exactly? And how? spit does not take a sequence of lines. Hence you'll have to do something like this: (->> old-data (map change-line) (interpose \newline) (apply str) (spit "output.txt")) Sincerely Meikel -- 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
