You don't need xargs: 
ls | perl -nE'chomp; say $_ if -d $_'

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neither you need ls: 
perl -E'for (<*>) {say $_ if -d $_}'

[download]

In reply to Re: ls piped tpo perl -pe runs indefintely by zwon
in thread ls piped tpo perl -pe runs indefintely by ISAI student

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