Hi, Randall! :)
(BTW, great book. :-D In case you hadn't been told enough!)
On 13 Sep 2001 [EMAIL PROTECTED] wrote:
> >>>>> "Bob" == Bob Showalter <[EMAIL PROTECTED]> writes:
> Bob> perl -e '-f $_ || print "Missing $_\n" for map {/^(.*)\.c$/; "$1.out"}
> Bob> @ARGV' *.c
> No. You've used $1 without verifying the match matched (in which
> case it would get the PREVIOUS match). For example, I can touch
> "foo\nbar.c" and run your script, and you'll get the wrong answer.
What's wrong with this? Note that he's passing the *.c glob, so you'd
expect to only find .c files in @ARGV, right? And if there're no *.c
files in the current directory, then the script just prints nothing.
Isn't that the correct behavior?
> IMPORTANT RULE - Never ever ever use $1 except in a conditional
> context!!!
That makes sense if you don't feel completely confident about your
inputs... but all the time?
---Jason
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