I forgot to mention: (nth (file-seq (java.io.File. "/DirectoryWithMillionsOfFiles/")) 200000) works great because nth doesn't realize the sequence!
For now, I'll look at nth's source code to see how it iterates. On Tue, May 1, 2012 at 11:24 PM, Sean Neilan <sneil...@gmail.com> wrote: > Hi, > > I'm sure this has been discussed to death but I can't figure it out. > > I've got a file-seq sequence from > (file-seq (java.io.File. "/DirectoryWithMillionsOfFiles/")) that will > cause an out of memory error if realized. > > I want to call a function such as println on every element in the sequence. > > I understand that naming the sequence will cause it to be realized. > > The problems > > 1. I can't use map as in (map println (file-seq (java.io.File. > "/DirectoryWithMillionsOfFiles"))). Map realizes the sequence. > 2. I can't use for as in (for [x (files)] (println x)). For realizes > the sequence. > 3. I can't use dorun because even though dorun doesn't realize the > sequence, it can't execute a function on every element. > 4. I can't use loop recur because it also realizes the sequence: (loop > [a (files) b (first a)] (println b) (recur (rest a) (first a))) > 5. I can't use refs because even though they provide state, they can't > save the state of the sequence without realizing the sequence. > > My question > *Should I try the new stream library?* > * > * > Thank you for your time. > > -Sean > > -- 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
