Here's a grep solution: 

my %seen;
@$ref = grep { ! $seen{$_->{id}}++ } @$ref;

[download]

My test is in the spoiler.

<Reveal this spoiler or all in this thread>

-- Ken

In reply to Re: removing duplicates from an array of hashes by kcott
in thread removing duplicates from an array of hashes by Anonymous Monk

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