Two short ways would be:

defined and s/^\s+|\s+$//g for ( $ipaddress, $prefix, $interface, $dev
+ice, $location, $comment );

[download]

defined ? s/^\s+|\s+$//g : 1 for ( $ipaddress, $prefix, $interface, $d
+evice, $location, $comment );

[download]

In the first case you use the fact that and does not execute the second operand if the first one is false. In the second case, test ? instr1 : instr 2; is syntactic sugar for if (test) { instr1; } else { instr2; }. You do have to write a second instruction though, and since Perl doesn't provide a no-op instruction (but you can make one), the 1 in my example can't be omitted.

In reply to Re: Test if multiple variables are defined by Eily
in thread Test if multiple variables are defined by stroke

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