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A comment on Show HN: Command Line Challenge. Parent comment

Re:Show HN: Command Line Challenge by schoen on Thursday January 26, 2017 @05:58PM (#13496159)
I also used this approach but the original creator's version posted on GitHub is remarkably more concise (due to a clever use of the ++ operator).
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Re:Show HN: Command Line Challenge by ianmcgowan on Thursday January 26, 2017 @08:16PM (#13496946)
awk '!h[$0]++' faces.txt

That is clever! Awk golf hole-in-one ;-)

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