Replace 

for my $x ( ... ) {
   ...

   if ( ??? ) {
      ...
   }

   ...
}

[download]
with 
my @a = ...;

for my $i ( 0 .. $#a ) {
   my $x = $a[$i];

   ...

   if ( $i == $#a ) {
      ...
   }

   ...
}

[download]

This will work too: 

my @a = ...;

for my $x (@a) {
   ...

   if ( \$x == \$a[-1] ) {
      ...
   }

   ...
}

[download]

Warning: As LanX pointed out, the last snippet fails if two elements of the array are aliases of the same scalar.

Update: Added warning.

In reply to Re: Perl's feature to determine, in current point of loop, that this is the last one? by ikegami
in thread Perl's feature to determine, in current point of loop, that this is the last one? by Anonymous Monk

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