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  1. or download this
    $uniq{"$file"} = ({"suffix1"=>"$suff"}); 
$uniq{"$file"} = ({"suffix2"=>"$suff"});
  2. or download this
    # assign hashref with first key-value-pair
$uniq{"$file"} = {"suffix1" => "$suff"};
# add additional key-value-pair
$uniq{"$file"}->{"suffix2"} = "$suff";