Or if you do not want to re-invent the wheel:

use strict;
use List::MoreUtils(qw/uniq/);

my @uniques = uniq(<DATA>);

print @uniques;

__DATA__
Name1
Name2
Name2
Name3
Name3
Name3
Name3
Name4
Name4

[download]

Output: 

Name1
Name2
Name3
Name4

[download]

The initial list does not have to be sorted (as with the UNIX uniq) and the order is preserved.

CountZero

"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law

In reply to Re: removing duplicate lines by CountZero
in thread removing duplicate lines by Anonymous Monk

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