I am not sure but I think filter will always output a sequence. You can either: - write filter-array using a loop/recur.
- read/write lazily the file in a sequence and use sequence function. If it is possible in your situation, I would advise this one. On Sat, Aug 21, 2010 at 4:42 PM, Piotr 'Qertoip' Włodarek <qert...@gmail.com> wrote: > I need to process large binary files, i.e. to remove ^M characters. > > Let's assume files are about 50MB - small enough to be processed in > memory (but not with a naive implementation). > > The following code works, except it throws OutOfMemoryError for file > as small as 6MB: > > (defn read-bin-file [file] > (to-byte-array (as-file file))) > > (defn remove-cr-from-file [file] > (let [dirty-bytes (read-bin-file file) > clean-bytes (filter #(not (= 13 %)) dirty-bytes) > changed? (< (count clean-bytes) (alength dirty- > bytes))] ; OutOfMemoryError > (if changed? > (write-bin-file file clean-bytes) ; writing works fine > nil))) > > How to force 'filter' to be efficient, i.e. create another array > instead of a memory-blowing list? > > How to approach processing large binary data in Clojure? > > -- > 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
