Uh... Yes... But that makes your one-liner longer and saving the overhead of calling clear really isn't worth it.

-sauoq
"My two cents aren't worth a dime.";

Or... skip the system call altogether and use some ascii escape codes :) Assuming you're using a terminal that supports it:

perl -le 'print "\e[2J\e[H", `who` and sleep 2 while 1'
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Or... bring back clear to make it slightly more portable and save some keystrokes. :-)

perl -e 'print `clear`,`who` and sleep 2 while 1'
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-sauoq
"My two cents aren't worth a dime.";