Show HN: Command Line Challenge

Re:Show HN: Command Line Challenge by ianmcgowan on Thursday January 26, 2017 @05:22PM (#13495821)

Mine was more procedural - store each line in a hash as you visit it, and only print lines you haven't already visited. awk is awesome ;-)

awk '!h[$0] {h[$0]=1; print}' faces.txt

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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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