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
I've tried several other paths. From the REPL I can type
(def in (new java.io.FileInputStream "file.o"))
(def fetchbyte #(. in (read)))
(fetchbyte)
and it all works fine. Is there a way to return a closure in Clojure?
I tried using a lazy-cons to make a lazy stream but that also failed.
I tried (seq (. in (read))) to generate an iterator-style walker but
that failed.
Tim Daly
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