Look for the Ternary operator in the perlop doc. 
ref $res ? $res->faultstring : $soap->transport->status

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Could be written as 
if (ref $res){ #$res is a reference and not a scalar
   die $res->faultstring; # exit printing the fault
}
else{
  die $soap->transport->status; #Exit with the current transport statu
+s of the SOAP object
}

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print "Good ",qw(night morning afternoon evening)[(localtime)[2]/6]," fellow monks."

In reply to Re: What's the meaning of die ref $res... ? by Utilitarian
in thread What's the meaning of die ref $res... ? by miguelele

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