I've noticed that the output of a script, is often different to the
output of the same commands if run on the REPL. This makes sense, but
here's a situation which has got me a little confused. I'm trying to
run this code as a script...
(use '[clojure.contrib.duck-streams])
(for [line (line-seq (reader "C:\\filedupes.txt"))]
(cond
((complement nil?) (re-matches #"([0-9]+) byte\(null\)each:"
line))
(println "Byte pattern!")
((complement nil?) (re-matches #".*(\.[0-9a-zA-Z]+)" line))
(println "File pattern!")
)
)
(println "Finished!")
The problem is, the only output I get is "Finished!". If however, I
run this on the command line, I get a long list of nil's in amongst
the strings "Byte pattern!" and "File pattern!". I expect the nil's
not to show when this is run as a script, but why are the
aforementioned strings not being output?
While you're at it, you may be able to help me with an additional
problem I'm trying to tackle. As you can see if the above code, I'm
trying to match on certain lines of a text file. I'm using "cond" to
do this with as a switch statement is the only way I know how to
achieve what I'm after. Anyway, I not only want the regex to be used
in the condition expression, but also want to capture the first sub-
match (i.e. what's in the parenthesis inside the regex). What's the
best way I can do this, without having to re-run the regex twice.
Thanks
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