http://www.perlmonks.org?node_id=1095197


in reply to Hash will not print if a value begins with 2 under certain conditions

Just a supplement to the advice given by Anonymous Monk:

Data::Dumper provides a Useqq configuration variable which, when set, causes Dumper to print any newline, tab, or carriage return characters as \n, \t, and \r, respectively. This makes it easier to see exactly what is present in each variable. Here is how I would deploy this feature to begin the debugging process:

... use Data::Dumper; $Data::Dumper::Indent = 0; $Data::Dumper::Terse = 1; $Data::Dumper::Useqq = 1; ... foreach my $key (sort keys %ref) { ... foreach(@temp) { if ($temp[0] == 2) { printf "\$key = %s\n \$ref{%s} = %s\n \$probes[%s] = %s\ +n", Dumper($key), Dumper($key), Dumper($ref{$key}), Dumper($key), Dumper($probes[$key]); print $key."\t".$ref{$key}."\t".$probes[$key]; } } }

Hope that helps,

Athanasius <°(((><contra mundum Iustus alius egestas vitae, eros Piratica,

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Re^2: Hash will not print if a value begins with 2 under certain conditions
by BillKSmith (Monsignor) on Jul 28, 2014 at 13:52 UTC
    I know that this is somewhat off-topic. Thanks for motivating me to read the documentation of Data::Dumper. Those configuration variables resolved a long standing problem.
    Bill