Thank you very much, Rob. Lizhe Xu US DHS PIADC PO Box 848 Greenport NY 11944 [EMAIL PROTECTED] Tel: 631 323 3023 fax: 631 323 3295
________________________________ From: Rob Dixon [mailto:[EMAIL PROTECTED] Sent: Thu 6/14/2007 10:36 AM To: beginners@perl.org Cc: Xu, Lizhe Subject: Re: Hash Key is a Null Value Xu, Lizhe wrote: > On Jun 14, 8:50 am, [EMAIL PROTECTED] (Chas Owens) wrote: >> To force Data::Dumper to do the right thing for the >> display you must set $Data::Dumper::Useqq to 1. It will then use >> doublequoted strings and escape characters (like \t, \n, \0 etc). >> >> perl -MData::Dumper -e '$Data::Dumper::Useqq = 1;%h = ("\0", 3);print >> Dumper(\%h);' >> $VAR1 = { >> "\0" => 3 >> }; > > The above code did not work on my XP computer, I got: > > C:\>perl -MData::Dumper -e '$Data::Dumper::Useqq = 1;%h = ("\0", 3);print > Dumper (\%h);' > Can't find string terminator "'" anywhere before EOF at -e line 1. > > When I changed single quote to double quote, the result is different > C:\>perl -MData::Dumper -e "$Data::Dumper::Useqq = 1;%h = ("\0", 3);print > Dumper > (\%h);" > $VAR1 = { > "SCALAR(0x36c10)" => 3 > }; > > > How to fix it? Thanks. Windows accepts only double quotes as parameter delimiters. This should work on your system: perl -MData::Dumper -e "$Data::Dumper::Useqq = 1;%h = (qq(\0), 3);print Dumper (\%h);" HTH, Rob -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
