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[codepad]
my @ary = (0..7);
print "\$ary[$_] = $ary[$_]\n" for (0..7);
{
  local $[ = 1;
  print "\$ary[$_] = $ary[$_]\n" for (1..8);
}
perldoc perlvar
$[     The index of the first element in an array, and of the first
       character in a substring.  Default is 0, but you could
       theoretically set it to 1 to make Perl behave more like awk (or
       Fortran) when subscripting and when evaluating the index() and
       substr() functions.  (Mnemonic: [ begins subscripts.)

       As of release 5 of Perl, assignment to $[ is treated as a
       compiler directive, and cannot influence the behavior of any
       other file.  (That��s why you can only assign compile��time
       constants to it.)  Its use is highly discouraged.

       Note that, unlike other compile��time directives (such as
       strict), assignment to $[ can be seen from outer lexical scopes
       in the same file.  However, you can use local() on it to
       strictly bind its value to a lexical block.

���ƤΤȤ��ꡢIts use is highly discouraged.�Ȥ��롣�褤���ϻȤ�ʤ������褤��������a2p(awk������ץȤ�perl����������ץ������;perl�򥤥󥹥ȡ��뤹��Ȥ��ʤ��դ��Ƥ���)�ʳ������������ǤϤ��뤬��$�ؤ�++���餤�ˤϤʤ뤫���Τ�ʤ���

Dan the Perl Monger