$# is no longer supported

To get highest index number on an array you use:

$#array

Doing this on an arrayref:

$#{arrayref}

I get a warning "$# is no longer supported". The program does continue.

Apparently $# and $* were deprecated in regular expression context and that e=
rror message exactly is documented in CPAN.

Seems like a bug in Perl (5.10.0), but perhaps I could be doing something to=
make Perl believe I'm trying to use the deprecated $# regular expression va=
riable.

Any ideas on how I can remove the ambiguity and the warning?

Thanks,
Dave=

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Re: $# is no longer supported

On 11-09-20 11:38 AM, David Jacopille wrote:
> To get highest index number on an array you use:
>
> $#array
>
> Doing this on an arrayref:
>
> $#{arrayref}

Try:

$#{$arrayref}


>
> I get a warning "$# is no longer supported". The program does continue.
>
> Apparently $# and $* were deprecated in regular expression context and that error message exactly is documented in CPAN.
>
> Seems like a bug in Perl (5.10.0), but perhaps I could be doing something to make Perl believe I'm trying to use the deprecated $# regular expression variable.
>
> Any ideas on how I can remove the ambiguity and the warning?
>
> Thanks,
> Dave


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Re: $# is no longer supported

>>>>> "DJ" == David Jacopille writes:

DJ> To get highest index number on an array you use:

DJ> $#array

DJ> Doing this on an arrayref:

DJ> $#{arrayref}

that is a bareword and not an array ref. so perl is parsing $# as the
deprecated builtin variable

DJ> I get a warning "$# is no longer supported". The program does
DJ> continue.

DJ> Apparently $# and $* were deprecated in regular expression context
DJ> and that error message exactly is documented in CPAN.

these work fine:

perl -lwe '$x = [1,2]; print $#$x'
1
perl -lwe '$x = [1,2]; print $#{$x}'
1

uri

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Re: $# is no longer supported

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Content-Type: text/plain; charset=ISO-8859-1

Hi,

On 20 September 2011 16:50, Uri Guttman wrote:

> >>>>> "DJ" == David Jacopille writes:
>
> DJ> I get a warning "$# is no longer supported". The program does
> DJ> continue.
>
> DJ> Apparently $# and $* were deprecated in regular expression context
> DJ> and that error message exactly is documented in CPAN.
>
> these work fine:
>
> perl -lwe '$x = [1,2]; print $#$x'
> 1
> perl -lwe '$x = [1,2]; print $#{$x}'
> 1
>

I usually find I want the size (instead of the index):

perl -lwe '$x = [1,2]; print scalar(@{$x});'
2

or last element in the array:

perl -lwe '$x = ["a","b"]; print $x->[-1];'
b

Might not be relevant here but thought I'd mention them just incase.

Leo

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