Hello Monks,

 I've got a simple problem with a configuration file parser/settings object.

 I've written a simple module which allows access to configuration values, and I find that I'm not able to differentiate between a value that is unset, and a value that is zero easily.

 Consider the following:

   my $value = getConfigValue( "use_foo" ) || 1;

[download]

 What I want to do is to say read the value, and if it's not defined use '1' as a default. What actually happens is that if the value is set to '0' it gets ignored.

 I see the following as a solution:

   my $value = getConfigValue( "use_foo" );
   if ( !defined( $value ) ) { $value = 1; }

[download]

 but that seems a little messy.

 Short of re-writing the code to be 'getConfigValue( "keyname", "default" )' which would be a pain is there a simple solution?

Steve
---
steve.org.uk

In reply to undef vs 0 by skx

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