[REBOL] need help with comparison operator <> evaluation
From: sendit2me:linuxmail at: 15-Nov-2003 0:06
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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