I keep ruminating on this, trying to understand what you're trying to do. I'm guessing that you want to have one master array that holds data and attributes, but you want to be able to grow/shrink the data portion of it, while maintaining the aliases to the attributes. If so, the splice limitation I mentioned above might not be a problem. For example: 

use strict;
use warnings;
use Data::Alias;

my @data = ( 1 .. 3 );
my @attributes = ( 'a' .. 'd' );

my @master = ( scalar @data, @data, @attributes );

alias my @alias = @master[ 1 + $master[0] .. $#master ];

print "After alias\n";
print "master: ", join(q{,}, @master ), "\n";
print "attrib: ", join(q{,}, @alias  ), "\n";
print "\n"; 

$alias[0] = 'z';

print "After change\n";
print "master: ", join(q{,}, @master ), "\n";
print "attrib: ", join(q{,}, @alias  ), "\n";
print "\n";

splice @master, 2, 0, '6';
$master[0]++;

print "After splice\n";
print "master: ", join(q{,}, @master ), "\n";
print "attrib: ", join(q{,}, @alias  ), "\n";
print "\n";

[download]

Prints

After alias
master: 3,1,2,3,a,b,c,d
attrib: a,b,c,d

After change
master: 3,1,2,3,z,b,c,d
attrib: z,b,c,d

After splice
master: 4,1,6,2,3,z,b,c,d
attrib: z,b,c,d

[download]

The splice happens in the data section, which is not aliased, and it doesn't disturb the alias to the attributes. So offsets you define for specific attributes (from the start of @alias) would be preserved.

-xdg

Code written by xdg and posted on PerlMonks is public domain. It is provided as is with no warranties, express or implied, of any kind. Posted code may not have been tested. Use of posted code is at your own risk.

In reply to Re^2: (Expert) Splicing a slice by xdg
in thread (Expert) Splicing a slice by dragonchild

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.