Hi

Either I'm missing something, or I've found a bug..

The following code should in my opinion print out the same in the first and second loop. But somehow the middle loop actually alters the array.

What is happening?

#!/usr/bin/perl my $arrayref = ['A','_B','C']; foreach my $str (@{$arrayref}) { print "BEFORE: str = $str\n"; } foreach my $str (@{$arrayref}) { $str =~ s/^\_//g; } foreach my $str (@{$arrayref}) { print "AFTER: str = $str\n"; }

OUTPUT:

BEFORE: str = A BEFORE: str = _B BEFORE: str = C AFTER: str = A AFTER: str = B AFTER: str = C
-----BEGIN PERL GEEK CODE BLOCK----- Version: 0.01 P++>*$c--->---P6 > R >++++$M+>+++$O+++>+++$MA->+++$E > PU->++BD->-C+>+$D+>+$S->+++X >+WP >+++MO!PP n?CO--PO!>!(!)o?G!A--OLC--OLCC--OLJ--Ee !Ev-Eon-uL++>*uB!uS!uH-uo!w->!m+ ------END PERL GEEK CODE BLOCK------

In reply to Possible bug with array pointer by jockel

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.