Chas Owens wrote:
><snip>
>> Alternately, you could say:
>>
>> $track ||= '';
>>
>> right before the next time you use foo after the split. I dont know
why this
>> works offhand, I just remember reading in the docs somewhere that
its exempt
>> from warnings. But for me, that is crossing over into the land of
ugly =0).
></snip>
>
>$track ||= '';
>
>is equivalent to
>
>$track = $track || '';
>
>which is equivalent to
>
>if ($track) {
> $track = $track;
>} else {
> $track = '';
>}
>
When I said, "I dont know why this works...", I meant I dont remember
why ||= is exempt from warnings. I know what it does.
Your examples are neither equivalent nor dangerous in the context of
this thread. We are trying to avoid "undefined value..." warnings by
the use of a variable after a split.
Im sure your second example is not exempt from the warning ,where
$track ||= ''; is exempt.
also, The original OPs conditional following the split uses the eq
operator with $track as one of its arguments, so the zero issue does
not apply.
This was my second example, and my first suggestion to use:
if ( defined($track) and ( $track eq "foo") ) { ....
would be the most prudent IMHO.
Todd W
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