Works for me now. No idea what changed. Different day. Sigh. On Mar 3, 12:07 pm, Michael Wood <[email protected]> wrote: > 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]>
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