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2 points by jsgrahamus 3539 days ago | link | parent

This seems to be onto something!

  Use (quit) to quit, (tl) to return here after an interrupt.
  arc> (def read-all2 (filename)
         (w/infile file filename))
  #<procedure: read-all2>
  arc> (read-all2 "Log.txt")
  Error: "_R: undefined;\n cannot reference undefined identifier"
  arc> (w/infile file "Log.txt" (drain (readline file)))
  ("===== \t11:52:29 AM\r" "===== \t11:56:49 AM\r" "===== \t12:10:19 PM\r" "===== \t12:39:31 PM\r" "===== \t1:08:54 PM\r" "===== \t1:11:19 PM\r" "=====\t2:14:21 PM\r" "===== \t2:14:33 PM\r" "===== \t12:36:29 PM\r" "===== \t5:13:08 PM\r" "===== \t9:56:43 AM\r" "===== \t2:36:16 PM\r" "===== \t4:23:45 PM\r" "===== \t2:35:41 PM\r")
  arc> (w/infile file "Log.txt" (readline file))
  "===== \t11:52:29 AM\r"
  arc>


1 point by akkartik 3539 days ago | link

So it looks like the inlined version works, but wrapping it in a function doesn't? Very strange. Paste these lines one at a time into a fresh arc session and show me what you get in response to each line.

  (w/infile file "Log.txt" (drain (readline file)))  ; just to set a baseline
  (def foo (filename) (prn "AAA") (w/infile f filename (prn "BBB") (drain (do1 (readline f) (prn "CCC")))))
  (foo "Log.txt")
  (def foo (filename) (prn "AAA") (w/infile f filename (prn "BBB") (readline f)))
  (foo "Log.txt")

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2 points by jsgrahamus 3539 days ago | link

akkartik, here are the results.

  Use (quit) to quit, (tl) to return here after an interrupt.
  arc> (w/infile file "Log.txt" (drain (readline file)))  ; just to set a baseline
  ("===== \t11:52:29 AM\r" "===== \t11:56:49 AM\r" "===== \t12:10:19 PM\r" "===== \t12:39:31 PM\r" "===== \t1:08:54 PM\r" "===== \t1:11\t2:14:21 PM\r" "===== \t2:14:33 PM\r" "===== \t12:36:29 PM\r" "===== \t5:13:08 PM\r" "=====\t9:56:43 AM\r" "===== \t2:36:16 PM\r" "M\r" "=====\t2:35:41 PM\r")
  arc> (def foo (filename) (prn "AAA") (w/infile f filename (prn "BBB") (drain (do1 (readline f) (prn "CCC")))))
  *** redefining foo
  #<procedure: foo>
  arc> (foo "Log.txt")
  AAA
  BBB
  CCC
  CCC
  CCC
  CCC
  CCC
  CCC
  CCC
  CCC
  CCC
  CCC
  CCC
  CCC
  CCC
  CCC
  CCC
  ("===== \t11:52:29 AM\r" "===== \t11:56:49 AM\r" "===== \t12:10:19 PM\r" "===== \t12:39:31 PM\r" "===== \t1:08:54 PM\r" "===== \t1:11\t2:14:21 PM\r" "===== \t2:14:33 PM\r" "===== \t12:36:29 PM\r" "===== \t5:13:08 PM\r" "===== \t9:56:43 AM\r" "===== \t2:36:16 PM\r" "M\r" "===== \t2:35:41 PM\r")
  arc> (def foo (filename) (prn "AAA") (w/infile f filename (prn "BBB") (readline f)))
   *** redefining foo
  #<procedure: foo>
  arc> (foo "Log.txt")
  AAA
  BBB
  "===== \t11:52:29 AM\r"
  arc>

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1 point by akkartik 3539 days ago | link

I think rocketnia has figured it out. Does rocketnia's comment http://arclanguage.org/item?id=19137 make sense? Basically you shouldn't get an error if you type in this expression character by character, but you should if you paste it into an arc session without a trailing <enter>.

  (def read-all2 (filename)
    (w/infile file filename))
(Try it out each time as before by running (read-all2 "Log.txt"))

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2 points by jsgrahamus 3538 days ago | link

  arc> (def read-all (filename) (w/infile file filename (drain (readline file))))
  arc> (read-all "Log.txt")
("===== \t11:52:29 AM\r" "===== \t11:56:49 AM\r" "===== \t12:10:19 PM\r" "===== \t12:39:31 PM\r" "===== \t1:08:54 PM\r" "===== \t1:11:19 PM\r" "=====\t2:14:21 PM\r" "===== \t2:14:33 PM\r" "===== \t12:36:29 PM\r" "===== \t5:13:08 PM\r" "===== \t9:56:43 AM\r" "===== \t2:36:16 PM\r" "===== \t4:23:45 PM\r" "===== \t2:35:41 PM\r")

Thanks for that.

It does appear that the problem is with pasting into the repl. So, how does one hook up arc with Emacs?

Thanks to all those who chimed in with help. Great community here.

Steve

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