arunhorne,
You have a prototype, which is a little different than a regular subroutine. I will leave reading about the prototype to you and how to get it to work with either arrays or references to arrays. 
sub util_remove_duplicates {
    my $array_ref = shift;
    my %hash;
    @hash{@{$array_ref}} = ();
    return keys %hash;
}

[download]
There are a couple of things to point out.
  • Check out wantarray to see if the sub is being called in list or scalar context - that way you can return the list or a ref
  • You do not need to undef the hash after you create it with my
  • You could reduce it even further, but it becomes less readable

    Cheers - L~R

    In reply to Re: Removing Duplicates from Array Passed by Reference by Limbic~Region
    in thread Removing Duplicates from Array Passed by Reference by arunhorne

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