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1 point by akkartik 1313 days ago | link | parent

Very strange. What arc are you using?

Can you try it without the drain, just read the first line from the file?

Edit 10 minutes later: here's a few things I would try:

  ; a relative path with no slashes/backslashes
  (read-all "mccf2.txt")
  ; inline read-all
  (w/infile file "mccf2.txt" (drain (readline file)))
  ; try reading just the first line
  (w/infile file "mccf2.txt" (readline file))


2 points by jsgrahamus 1313 days ago | link

This is arc 3.1

  C:\Users\Steve\Documents\Programming\Lisp\arc\arc3.1>type log.txt
  =====   11:52:29 AM
  =====   11:56:49 AM
  =====   12:10:19 PM
  =====   12:39:31 PM
  =====   1:08:54 PM
  =====   1:11:19 PM
  =====   2:14:21 PM
  =====   2:14:33 PM
  =====   12:36:29 PM
  =====   5:13:08 PM
  =====   9:56:43 AM
  =====   2:36:16 PM
  =====   4:23:45 PM
  =====   2:35:41 PM

  C:\Users\Steve\Documents\Programming\Lisp\arc\arc3.1>dir c:\log.txt
   Volume in drive C is TI105757W0A
   Volume Serial Number is 48C4-C0F7

   Directory of c:\

  12/17/2014  03:40 PM               271 Log.txt
                 1 File(s)            271 bytes
                 0 Dir(s)  61,392,650,240 bytes free

  C:\Users\Steve\Documents\Programming\Lisp\arc\arc3.1>

  Use (quit) to quit, (tl) to return here after an interrupt.
  arc> (def read-all (filename)
         (w/infile file filename
                   (drain (readline file))))
  #<procedure: read-all>
    arc> (read-all "Log.txt")
  Error: "_R: undefined;\n cannot reference undefined identifier"
  arc> (read-all "c:Log.txt")
  Error: "_R: undefined;\n cannot reference undefined identifier"
  arc> (read-all "c:/Log.txt")
  Error: "_R: undefined;\n cannot reference undefined identifier"
  arc> (read-all "c:\\Log.txt")
  Error: "_R: undefined;\n cannot reference undefined identifier"
arc>

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2 points by jsgrahamus 1313 days ago | link

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>

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1 point by akkartik 1313 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 1313 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 1312 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 1312 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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