CODE1: 
@arr = qw/Foo Bar Blaz/;
foreach my $ele ( @arr ) {
  $ele =~ s/^(.)/x$1/;
  do_something ( $ele ) ;
}
print "@arr"; # I got 'xFoo xBar xBlaz'

[download]

CODE2: 

@arr = qw/Foo Bar Blaz/;
foreach my $ele ( @arr ) {
  my $copy = $ele ;
  $copy =~ s/^(.)/x$1/;
  do_something ( $copy ) ;
}
print "@arr"; # I got 'Foo Bar Blaz'

[download]
I just found that, in CODE1, the array elements will change after the run. However, I suppose that $ele is a copy from the array, but seems it behaves like a reference. But if I try print ref $ele it returns nothing so its not reference. Anyway, CODE2 is what I would expect.

So, I just want to know: 

1. Is this normal for the being in CODE1 or I missed something? 
2. Is this happen in all Perl version? ( I am using 5.10 now) and was using 5.6~5.8 before
Because I am considering to have some revision on modules I wrote before now...

In reply to Array got modified! by exilepanda

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