That wont work if the array is intentionally sparse.

This is not a supported "feature". It's the side effect of a bug in exists.

But my fix was wrong. (I've been fixing uses of exists to check if an element exists.) It should be

if ( defined( $this->{N}[$1] ) ) {
   my $testedNVal = $this->{N}[$1]{Val};
   ...
}
[download]

And in all likelyhood, the following would also do the trick:

if ( $this->{N}[$1] ) {
   my $testedNVal = $this->{N}[$1]{Val};
   ...
}
[download]