http://www.perlmonks.org?node_id=472837


in reply to Should I use Fields, InsideOuts, or Properties?

Instead of

$hashref->{typo}

do this:

use constant TYPO => 'typo'; $hashref->{(TYPO)}; # OK $hashref->{(TIPO)}; # Compile-time error, just what you want

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Re^2: Should I use Fields, InsideOuts, or Properties?
by djp (Hermit) on Jul 08, 2005 at 04:00 UTC
    That's (a) disgusting, and (b) largely useless, since it won't catch $hashref->{tipo};.
      The whole point is not to use quoted or literal strings for hash keys, but make yourself use constants and force compile-time check by placing parentheses around them.

      One added benefit of such approach is that if you want to change the actual key value, you only have to change it in one place.