SPUG: scalar(@array)
Patterson, David S (David)
davidpa at lucent.com
Thu Apr 13 19:17:34 CDT 2000
Hmmm... Very perplexing... Running the following program
@array = (aa, bb, cc, dd, ee);
print @array, ' ', scalar (@array), "\n";
undef $array[3];
print @array, ' ', scalar (@array), "\n";
print @array, ' ', $#array, "\n";
gives the following output:
aabbccddee 5
aabbccee 5
aabbccee 4
What does this mean? Are there 4 elements or 5?
I thought I read once that the underlying implementation of arrays in Perl
was just another hash table.
Is this true? Did it change between Perl 4 and Perl 5?
"The first 90% of the project takes 90% of the time, and the
last 10% takes the other 90%..."
> David Patterson
> Software Engineer
> Lucent Technologies *
> 6464 185th Ave NE
> Redmond, WA 98052-6736
> 425-558-8008 x 2172
888-501-4835 Pgr
> davidpa at lucent.com
>
>
>
> -----Original Message-----
> From: R. Christianson [SMTP:ryannn at u.washington.edu]
> Sent: Thursday, April 13, 2000 4:19 PM
> To: Jeremy Mates
> Cc: 'SPUG'
> Subject: Re: SPUG: scalar(@array)
>
> What about doing $#array?
>
> Ryan Christianson
>
>
> On Thu, 13 Apr 2000, Jeremy Mates wrote:
>
> > The count you were probably expecting to see can be gained by doing
> > something like:
> >
> > for ( @array ) {
> > $count++ if defined;
> > }
> > print $count, "\n";
> >
> > --
> > Jeremy Mates (206) 221-4714 Fax: 685-7301
> > Systems Administrator K353-B, Health Sciences Center
> > http://www.mbt.washington.edu/ Box 357730
> > University of Washington Seattle, WA, 98195
> >
> >
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