unique elements in an array...complex data

Hi,

%arb=();
foreach(@contents)
{
$fnd{$_}=1;

}
@unique=keys %arb;

this gets unique values from an array...but I want to
find unique records BASED on one column!.

e.g. if a CSV contains road_name, road_number, etc.
and I want to just check for unique values for
road_name.

how do i do that, as the contents of the file are
dumped into an array, I don't wanna to parse then and
put them into another array, it seems a waste of time,
but is this the way?

Ben


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• unique elements in an array...complex data by Ben Crane
• unique elements in an array...complex data by Ben Crane