Re: The -w switch on a web application

I think it's a good idea to use defined ... however, if you got a new enough perl (and you should), look into the warnings pragma.

use warnings;
no warnings 'uninitialized';
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The other benefit of the "warnings" pragma is that its properly scoped, where as -w(aka $^W) is global, after all, you only wanna get warnings generated by your code, unless you plan submitting patches ;)

MJD says you can't just make shit up and expect the computer to know what you mean, retardo!
** The Third rule of perl club is a statement of fact: pod is sexy.

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Re: Re: The -w switch on a web application by zengargoyle (Deacon) on Jan 31, 2003 at 12:45 UTC
and if you have older perl... `#!/usr/bin/perl -w $SIG{__WARN__} = sub { local $_ = shift; print STDERR unless /Use of uninitialized value/; }; my $f; print "no warning here -->$f<--",$/; warn "woot! other warnings here...";` [download]	[reply] [d/l]

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Re: Re: The -w switch on a web application
by zengargoyle (Deacon) on Jan 31, 2003 at 12:45 UTC

and if you have older perl...

#!/usr/bin/perl -w

$SIG{__WARN__} = sub { 
        local $_ = shift;
        print STDERR unless /Use of uninitialized value/;
};

my $f;

print "no warning here -->$f<--",$/;

warn "woot! other warnings here...";
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[d/l]