Perl's passing of arrays and hashes is a little different from most other languages. So when you pass in an array @a to a subroutine, @_ will have (@#a +1 ) arguments. Essentially, it just unrolled the array for you.

To achieve what you are trying to do, pass in references to the arrays. You can then use the references in your subroutine or dereference them into arrays if you prefer.

use strict;
use warnings;

sub passingArray{
    my $tmp = $_[0];
    my $newtmp = $_[1];
    print "Number of elements tmp: ". scalar( @$tmp ) . "\n";
    print join( " ", @$tmp ) . "\n";

    print "Number of elements newtmp: ". scalar( @$newtmp) . "\n";
    print join( " ", @$newtmp) . "\n";

} #end of sub

my @data = ( 22, 33, 44 );
my @newdata = ( 55, 66, 77 );

passingArray( \@data, \@newdata );

[download]

Just a tongue-tied, twisted, earth-bound misfit. -- Pink Floyd

In reply to Re: passing whole array to a function by data64
in thread passing whole array to a function by han_perl

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.