On Apr 28, 2012, at 10:40 AM, sono...@fannullone.us wrote:
> On Apr 28, 2012, at 7:32 AM, Lesley Binks wrote:
>
>> Says the $host identifier will be assigned the value 'localhost' only if
>> $extra
>> is not defined.
>>
>> But $extra is defined as 'mail.example.com' so $host won't be.
>
> That makes sense. What I'm trying to do is set $host to one of the two
> values - if $xtra is set, use it; if not, use localhost. I was just trying
> to get it as short as possible. Maybe I'll go back to the if statement I had
> before.
>
If you're using a new enough Perl -- v5.10 or newer -- you can use the super
handy 'defined-or' operator for this:
my $extra = something_that_may_return_undef();
my $host = $extra // 'localhost';
chrs,
john.
--
John SJ Anderson // geneh...@genehack.org
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