jimmy.tty

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• Commented on Day 2: When uniq is not unique enough (App::nauniq)
  I think the easiest way to keep first occurrence of each line is one of: $ awk '!a[$0]++' input.txt or $ perl -ne'$h{$_}++||print' input.txt To keep the last occurrence is enough use command tac in input.txt before awk or perl...

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• perlancar commented on Day 2: When uniq is not unique enough (App::nauniq)

  $ perl -ne'$h{$_}++||print' input.txt

  Yup, that is what nauniq essentially does (plus some options).