Re: [MacPerl] unknown error question

[Arved Sandstrom <Arved_37@chebucto.ns.ca>]

On Wed, 9 Jun 1999, Robert Pollard wrote:

> CODE:
> #! perl -w
> 
> $holdingThing = 'Backup Folder';
> 
> ERROR:
> # Name "main::holdingThing" used only once: possible typo.
> File 'Untitled #3'; Line 3
> 
It's the Perl equivalent of an "unused variable" warning, which is common
enough with other language compilers also.

95% of the time, a variable showing up once like this means that in one
place in the code you've got $holdingThing and somewhere else you've got
$holding_thing, and one's a typo.

It's better to vet these with -w; later you can turn that switch off when
your code is production.

Arved



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