[REBOL] Re: need help with comparison operator <> evaluation
From: Steven:White:ci:bloomington:mn:us at: 14-Nov-2003 10:49
Regarding your statements:
INPUT-FILE: make string! INPUT-FILE
etc., are you trying to convert the words INPUT-FILE and OUTPUT-FILE to
strings for examination, and then to file names for reading? If so, I
believe that the "make" function is not the one for the job, and might
be clobbering the values in INPUT-FILE and OUTPUT-FILE. I believe the
proper functions for those operations would be "to-file" and
to-string.
Keeping in mind that I am a beginner...Hope That Helps.
Steven White
City of Bloomington
1800 W Old Shakopee Rd
Bloomington MN 55431-3096
USA
952-563-4882 (voice)
952-563-4672 (fax)
[steven--white--ci--bloomington--mn--us]
>>> [sendit2me--linuxmail--org] 11/14/03 10:06AM >>>
Greetings,
It seems like I always have the hardest time trying to do the
simplest things. For instance in the code snipet below the not equal
comparison EXTENSION-IN <> ".txt" always evaluates to true and always
appends ".txt" to the end of the string even if there's already .txt at
the end of the string. I don't understand. Thanks in advance.
INPUT-FILE: ask "Enter name of file with numbers to be processed: "
comment { user enters owwnumbers.txt }
OUTPUT-FILE: ask "Enter name of output file: "
INPUT-FILE: make string! INPUT-FILE
OUTPUT-FILE: make string! OUTPUT-FILE
comment { Are the last 4 chars of the str equal to ".txt"? If not
append ".txt" to the end of the string. }
EXTENSION-IN: substr INPUT-FILE ( (length? INPUT-FILE ) - 3) 4
print EXTENSION-IN comment { prints out .txt on the screen}
EXTENSION-OUT: substr OUTPUT-FILE ( (length? OUTPUT-FILE ) - 3) 4
if [EXTENSION-IN <> ".txt"] [append INPUT-FILE ".txt" ]
if [EXTENSION-OUT <> ".txt"] [append OUTPUT-FILE ".txt" ]
INPUT-FILE: make file! INPUT-FILE
OUTPUT-FILE: make file! OUTPUT-FILE
DIAL-PEERS-NUMBERS: read/lines INPUT-FILE ...
** Access Error: Cannot open /C/Documents and
Settings/svondrasek/Desktop/REBOL/owwnumbers.txt.txt
** Near: DIAL-PEERS-NUMBERS: read/lines INPUT-FILE
Steve Vondrasek
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