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Think about Loose Coupling

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While I use ptkdb for tracing, I also use the indispensible Data::Dumper::Simple0. Combining the latter with a global $_DEBUG allows me to do this:

use strict; use warnings; #... blah if ($_DEBUG) { require Data::Dumper::Simple; Data::Dumper::Simple->import; } sub _explain (@_); # ... some code $record = $sth->fetchrow_arrayref; _explain $record; # ... some code sub _explain (@_) { return undef unless $_DEBUG; local $|=1; my @call = caller(1); print '#- in ',$call[3],' ',Dumper($_),"\n" for (@_); }
This results in:
#- in mySub $record = [ 'aUser', 'aPassword' ]

I usually use STDOUT so I can redirect to a log file if I wish, but sometimes I call out to a logger module, too. One of the advantages of this is that I can set $_DEBUG in-code or with a command-line option &c., thereby controlling the verbosity level on a per-run basis.

0: I use this instead of Data::Dumper simply because it automagically prints the actual name of the variable instead of $VAR1 and the like. It's possible to do that with the Data::Dumper module, too, but the ::Simple version does it anyhow, so why reinvent that wheel?

Anima Legato
.oO all things connect through the motion of the mind

In reply to Re: I usually debug via... by legato
in thread I usually debug via... by rinceWind

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