I also recommend using a different link object method, url_abs, or else you might get relative:absolute duplicates. You'll also get what you expect instead of lots of apparently fragmentary URIs.

my @uniq_urls = grep !($seen{ $_->url_abs }++), @link;

In reply to Re^2: WWW::Mechanize link array de-dup by Your Mother
in thread WWW::Mechanize link array de-dup by MAC25

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