Happy-the-monk, that was stunning! I love it when I can replace 15 lines of code with only 2. I plugged it in and worked like a charm.

To be honest, I'm not sure how it works. My educated guess is it iterates through @AoH and assigns a key/value pair of page => 1 for every element. But why does it skip the 5th element (the dupe)? When I Dumper, I get: 
$VAR1 = 'fall';
$VAR2 = 1;
$VAR3 = 'winter';
$VAR4 = 1;
$VAR5 = 'spring';
$VAR6 = 1;
$VAR7 = 'summer';
$VAR8 = 1;

[download]
So, 1) why/how does it skip the dupe? 2) what does assigning the 1 do? 3) what does that 2nd line do to delete the key/value pairs of page => 1? Also, any good sources for learning how to disect a map/grep would be much appreciated. Thanks again.

Update: Found this helpful resource in the meantime.

—Brad
"A little yeast leavens the whole dough."

In reply to Re^2: Is there better way to delete dups in an AoH? by bradcathey
in thread Is there better way to delete dups in an AoH? by bradcathey

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