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Re^2: error in printing output of Data::Dumper to file

by prlusr (Initiate)
on Dec 10, 2012 at 07:57 UTC ( #1008063=note: print w/ replies, xml ) Need Help??


in reply to Re: error in printing output of Data::Dumper to file
in thread error in printing output of Data::Dumper to file

Yes, the code is reaching that point. When i am debugging the code it is giving me output like below

C:\>perl -d 9.pl Loading DB routines from perl5db.pl version 1.3 Editor support available. Enter h or `h h' for help, or `perldoc perldebug' for more help. main::(9.pl:11): my %myhash1 = (); DB<1> n main::(9.pl:12): my %myhash2 = (); DB<1> main::(9.pl:13): my $key; DB<1> main::(9.pl:14): my $val; DB<1> main::(9.pl:16): my $xml = new XML::Simple; DB<1> main::(9.pl:18): my $data1 = $xml->XMLin("sample.xml"); DB<1> main::(9.pl:20): my $data2 = $xml->XMLin("sample2.xml"); DB<1> main::(9.pl:25): open FH5, ">>tagfile1" or die "error in readin +g..debug 1 "; DB<1> main::(9.pl:29): print FH5 Dumper($data1) or die $!; DB<1> main::(9.pl:32): while (<FH5>) main::(9.pl:33): { DB<1> main::(9.pl:43): close FH5;
I am using perl v5.10.0 on windows.


Comment on Re^2: error in printing output of Data::Dumper to file
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Re^3: error in printing output of Data::Dumper to file
by quester (Vicar) on Dec 10, 2012 at 08:30 UTC

    Oh. The file is being written to, but you can't read it because it was opened for append but not read (mode ">>" instead of "+>>"), and also because, due again to the append access, it is already positioned to the end of file when you do the first read.

    If you change the open mode from ">>" to "+>>", and insert   seek FH5, 0, 0 or die "Seek failed, $!"; just before  while (<FH5>) it should work.

    Another way would be to close FH5 and then reopen it for input (mode "<") just before trying to read it.

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