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Your code would not work correctly since the last would only break out of the inner for loop and the line
$sq_ds_uniq{$key} = $sq_ds{$key};
would always be executed. I would propose the following untested solution, where the function query_like would take the role of your "is like":
my %sq_ds_uniq; my @uniq_queries = (); for my $key (keys %sq_ds) { my $query = $sq_ds{$key}{query}; if (!grep {query_like($_, $query)} @uniq_queries) { $sq_ds_uniq{$key} = $sq_ds{$key}; push @uniq_queries, $query; } }

In reply to Re: Trimming hash based on element uniqueness by Anonymous Monk
in thread Trimming hash based on element uniqueness by mhearse

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