Re^2: Remove Duplicates from an Array of Arrays

Doesn't it seem like grep is a more natural choice?

my %seen_values;
my @new_AofA = grep { !($seen_values{$_->[0]}{$_->[1]}++) } @AofA;
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We're not really tightening our belts, it just feels that way because we're getting fatter.

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Re^3: Remove Duplicates from an Array of Arrays by rjbs (Pilgrim) on Jul 14, 2004 at 17:01 UTC
Yes, you're quite right. I think I got map in my head for some reason and ran with it! Anyway, fortunately both will work, and the use of %seen is the thing Dru probably needs. Roy's grep example helps make that clearer. rjbs	[reply]
Re^3: Remove Duplicates from an Array of Arrays by ysth (Canon) on Jul 14, 2004 at 17:33 UTC
Given the data, using old-style multidimensional hashing would work also: `my @new_AofA = grep { !$seen{$_->[0],$_->[1]}++ } @AofA;` [download]	[reply] [d/l]