SPUG: regular expression difficulty, plus compiled perl

Skahan, Vince Vince.Skahan at pss.boeing.com
Tue Mar 28 09:18:36 CST 2000



I'd use dirname() rather than roll my own. Any reason why doing it the 
unix way doesn't suffice ?

The following worked for me on my NT system using ActiveState
perl build 522...

	#!perl
	#
	# see page 328 of the PerlCookbook
	#
	use File::Basename;
	$dir=dirname($0);
	print "I'm called $0\n";
	print "I live in $dir\n";

When I save the script as c:\tmp\foo.pl and run it, it reports back
output that looks like:

	I'm called C:\TMP\foo.pl
	I live in C:\TMP

--
-------- Vince.Skahan at boeing.com ------ http://bcstec.ca.boeing.com/~vds/ -------------
                 Boeing Shared Services Group - Technical Services
                    outside Boeing - http://www.halcyon.com/vince


> ----------
> From: 	Todd Wells[SMTP:toddw at wrq.com]
> Sent: 	Monday, March 27, 2000 8:20 PM
> To: 	'spug-list at pm.org'
> Subject: 	SPUG: regular expression difficulty, plus compiled perl
> 
> I'm using ActiveState Perl on NT4 and trying to set a variable to be equal
> to the directory name that the script was ran in.
> 
> So, I look at $0 which contains the name of the script I ran... in this case
> "D:\PERL\COUNTP~1.PL"
> 
> But when I try to strip the filename off the end, I can't seem to do it.
> 
> print "First: $0\n";
> ($test1 = $0)=~ m#.*\\#;
> #$test1 =~ s/(.*\\)/$1/;	# I tried this too, and it didn't work
> either.
> print "Second: $test1\n";
> 
> The output:
> First: D:\PERL\COUNTP~1.PL
> Second: D:\PERL\COUNTP~1.PL
> 
> What's going on here?  Is the .* just being _really_ greedy?  I'm expecting
> $test1 to be "D:\PERL\"  
> I know this is silly, but I can't figure out the problem here.  
> 
> BTW, someone at the last SPUG meeting mentioned they were playing around
> with compiled Perl using ActiveState.  I can't seem to find any specifics on
> how to do this.  Perlfaq3 mentions it, but gives no specifics on how to
> actually do it, nor can I find any at Malcolm Beattie's site.
> 
> - Todd
> 
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