in reply to Re^5: To initialise or not to initialise?
in thread To initialise or not to initialise?

When you loop over a list, the local variable is aliased to each member of the list. If you modify the variable, then you modify the original member of the list as well.
  • Comment on Re^6: To initialise or not to initialise?

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Re^7: To initialise or not to initialise?
by runrig (Abbot) on Jun 24, 2004 at 23:27 UTC
    When you loop over a list, the local variable is aliased to each member of the list.

    Yes, I got that part. The part that surprises me is that B::Deparse deparses it to something that doesn't work, and I always assumed that the deparsing was correct. Consider:

    use strict;
use warnings;
foreach $_ (my ($foo, $bar, $baz)) {
  $_ = "default";
}
print "$foo\n";

    [download]
    This code doesn't run, and it is what I mistakenly assumed your code was the equivalent of (minus the use's and print).
[reply]
[d/l]
      Ah. Because it scopes the variables differently depending on whether the loop is inline or not.
[reply]
      The part that surprises me is that B::Deparse deparses it to something that doesn't work, and I always assumed that the deparsing was correct.

      Isn't that the definition of a bug in B::Deparse then?

      I wanted to file a bug report, but rt.cpan.org doesn't know about 'B::Deparse'. Where should it be sent to? Or did you do that already?

      -- Hofmator

[reply]
        B::Deparse is a core module, so it would go to p5p (or to PerlBug via perlbug). If you want to submit a bug report, search the p5p archives first (or bugs.perl.org), and I'm not sure if B::Deparse is suppose to guarantee perfectly accurate code.
[reply]

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