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bash-2.04$ perl -e 'print 5 % foo' Illegal modulus zero at -e line 1.
bash-2.04$ perl -e '$x = 5; $y = "foo"; print ($y ? $x % $y : $x); pri +nt "\n"' Illegal modulus zero at -e line 1. ... 0 bash-2.04$ perl -e '$x = 5; $y = "foo"; print (($y*1) ? $x % $y : $x); + print "\n"' 5
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