The idiomatic way in perl is to use a hash to mark already inserted data: 

my @data;
my %seen;
for (@input) {
  next if $seen{$_}++;
  push @data,$_;
}

[download]

using grep, that would be: 

my %seen;
my @data = grep { ! $seen{$_}++ } @input;

[download]
update: s/make/mark/
update2: fixed bug, thanks to Happy-the-monk
"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: Insert unique data into array by Joost
in thread Insert unique data into array by Anonymous Monk

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