in reply to Delete idempotence

Be careful with autovivification: 
perl -e 'use Data::Dumper; $x = {a => "B"}; print Dumper $x; delete $x
+->{y}{2}; print Dumper $x;'
$VAR1 = {
          'a' => 'B'
        };
$VAR1 = {
          'y' => {},
          'a' => 'B'
        };

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Re^2: Delete idempotence
by locked_user sundialsvc4 (Abbot) on Feb 10, 2012 at 13:26 UTC

    ++

    That one has bit me a time or three.   It’s not wrong, per se, but maybe a bit unexpected.

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