Beefy Boxes and Bandwidth Generously Provided by pair Networks
good chemistry is complicated,
and a little bit messy -LW

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Pass by reference - this is what I usually do:
my @array = qw(a b c d e f); my @new_array = do_something(\@array); #<- note the "\" sub do_something { my $array_ref = shift; my @new = (); foreach (@{$array_ref}) { #<- treat the ref as an array # do some stuff like build @new } return @new; }
You can also return ref's which means you can return mulitiple array, hash, and scalar references by using as a list with out them getting all flattened out together.

To give you a visual of what an array looks like versus an array reference, Data::Dumper would show:

For '@array' outside the subroutine:
$VAR1 = a $VAR2 = b ..etc
For '$array_ref' inside the subroutine:
$VAR1 = [a,b,c,d,e,f]
This is because $array_ref points to an anonymous array passed to to the subroutine while @array IS the array.

In reply to Re: passing arrays to subroutines by perlfan
in thread passing arrays to subroutines by Anonymous Monk

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, 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, 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.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others chilling in the Monastery: (5)
    As of 2018-05-27 00:06 GMT
    Find Nodes?
      Voting Booth?