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  1. echo -e 'e1 e2 e3 e4 e5\ne1 e1 e2 e2 e1\ne1 e1 e4 e4 e4' | perl -F -lane '$count{$_}++ for (@F);print scalar values %count;undef %count'
Success #stdin #stdout 0.02s 5348KB
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https://ideone.com/7SG7Qz
language:
Bash (bash 5.0.3)
created:
11 years ago
visibility:
public

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