map { $_ = '' unless defined } %$ref2;
To eliminate the void map, and not attack the keys (which don't need attacking), I'd go with: 
defined or $_ = "" for @$ref2{keys %$ref2};

[download]
or for 5.6 and later: 
defined or $_ = "" for values %$ref2;

[download]

-- Randal L. Schwartz, Perl hacker

In reply to Re: Re: setting values in anonymous hash by merlyn
in thread setting values in anonymous hash by agoth

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