> The problems > > I can't use map as in (map println (file-seq (java.io.File. > "/DirectoryWithMillionsOfFiles"))). Map realizes the sequence.
You can't use `map` because `map` will return a sequence of the same size and that can blow your heap. > I can't use for as in (for [x (files)] (println x)). For realizes the > sequence. > I can't use dorun because even though dorun doesn't realize the sequence, it > can't execute a function on every element. > 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))) Going by the examples here, it seems you are holding on the head by binding the while file-seq to a var called `files`. That is the problem. Take a look at my loop-recur example. You'll see that I create a temporary binding that gets reduced in size every time I recur. So in that example, I am not holding on to the head anywhere and the files that I have printed will get GCd quickly without blowing up. To repeat, the problem is in holding on to the head (ie. the whole sequence) and if you process every item and throw away items from the seq there shouldn't be any problem. Regards, BG -- Baishampayan Ghose b.ghose at gmail.com -- 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
