Seems shell doing *its work*.
This works for me:

perl -anF'\136' -e '$key="$F[0],$F[1],$F[2],$F[3]\n"; print $key if ( 
+! $seen{$key} ++ );' datafile

[download]

In reply to Re: perl one liner with -F special char by deibyz
in thread perl one liner with -F special char by LanceDeeply

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