Syntax to retrieve $# from de-referenced array

[sjcampbl]

I understand to retrieve the highest array subscript I use the
syntax...

$#MyArray

However, what if the array is a reference held within a greater hash
structure...

%MyHash{MyHashKey} holds a reference to an array

How do I retrieve $# on this?

$#{MyHash{MyHashKey}} doesn't seem to work.

 

[A. Sinan Unur]

(e-mail address removed) wrote in @s1g2000prg.googlegroups.com:

I understand to retrieve the highest array subscript I use the
syntax...

$#MyArray

However, what if the array is a reference held within a greater hash
structure...

%MyHash{MyHashKey} holds a reference to an array

How do I retrieve $# on this?

$#{MyHash{MyHashKey}} doesn't seem to work.

#!/usr/bin/perl

use strict;
use warnings;

my %MyHash = ( MyHashKey => [1, 2, 3] );

print $#{$MyHash{MyHashKey}}, "\n";

__END__

C:\Temp> h
2


--
A. Sinan Unur <[email protected]>
(remove .invalid and reverse each component for email address)

comp.lang.perl.misc guidelines on the WWW:
http://www.rehabitation.com/clpmisc/

 

[Jürgen Exner]

I understand to retrieve the highest array subscript I use the
syntax...

$#MyArray

Actually $MyArray[-1] maybe more perlish.

However, what if the array is a reference held within a greater hash
structure...

You can still use ....[-1]

%MyHash{MyHashKey} holds a reference to an array

How do I retrieve $# on this?

See 'perldoc perlretut' and follow rule 1 in "Using references".

jue

 

[Tad J McClellan]

I understand to retrieve the highest array subscript I use the
syntax...

$#MyArray

Actually $MyArray[-1] maybe more perlish.

Except that it does something completely different.

What is wanted is the subscript, not the value.