How do I tell perl -w: "I really want to use this var just once"

perl -w dings me if I use a variable just once:

Name "main::foo" used only once: possible typo...

even if I'm magically defining/using $foo somewhere else.

Is there any way to tag a variable to tell the -w option
that I'm
intentionally using that variable just once, and not to warn
me about it?

I realize I could do something like: "$foo = $foo"
to force the issue,
but that seems kludgy.

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On 12/18/06 7:49 PM, Kelly Jones at kelly.terry.jonesgmail.com
wrote:

> perl -w dings me if I use a variable just once:
> 
> Name "main::foo" used only once: possible
typo...

I guess it's warning you in case you meant to use it more
than once but
misspelt it here or elsewhere. You could get rid of warnings
by nt using -w,
but then you wouldn't get warnings ...






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--- In perl-beginner@yahoogroups.com, "Kelly
Jones"
<kelly.terry.jones...> wrote:
>
> perl -w dings me if I use a variable just once:
> 
> Name "main::foo" used only once: possible
typo...
> 
> even if I'm magically defining/using $foo somewhere
else.
> 
> Is there any way to tag a variable to tell the -w
option that I'm
> intentionally using that variable just once, and not to
warn me
about it?
> 
> I realize I could do something like: "$foo =
$foo" to force the issue,
> but that seems kludgy.
> 
If you use "my $foo" you won't get the warning
message.

Why are you declaring the variable if you are not using?
What purpose
does that line of code serve?



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