On 2 March 2010 23:57, TimDaly <[email protected]> wrote: > I would like to have a function that returns the next binary byte of a > file. > I tried > > (defn reader (file) > (let [in (new java.io.FileInputStream file] > #(. in (read)))) > > The idea is that I could call this function once and it would return a > closure > over the 'in' object. Then I could simply call reader to get the next > byte. As in > > (def fetchbyte (reader "file.o")) > > (fetchbyte) > > I get an error > java.lang.IllegalArgumentException: Don't know how to create ISeq > from: > clojure.lang.Symbol
Works for me after fixing the argument list (as mentioned by Meikel) and closing the parenthesis in the let vector. I also changed (new Blah something) to (Blah. something) and (. object (method)) to (.method object) but those should not make a difference: user=> (defn reader [file] (let [in (java.io.FileInputStream. file)] #(.read in))) #'user/reader user=> (def fetchbyte (reader "/etc/shells")) #'user/fetchbyte user=> (fetchbyte) 35 user=> (fetchbyte) 32 user=> (fetchbyte) 47 -- Michael Wood <[email protected]> -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to [email protected] Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/clojure?hl=en
