Re^2: Printing the length of an array ?

The ++ makes the array one element longer, adding an undef at the end:

my @array = qw/1 2 3 4 5 6 7/;
print "number of elements is " . ++$#array . "\n";
print Dumper \@array;
[download]

number of elements is 7
$VAR1 = [
          '1',
          '2',
          '3',
          '4',
          '5',
          '6',
          '7',
          undef
        ];
[download]

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Re^3: Printing the length of an array ? by ww (Archbishop) on Mar 30, 2008 at 21:30 UTC
Correct! Better, and clearer, to write for line 7: `my $count = $#array; print "number of elements is " . ++$count . "\n";` [download]	[reply] [d/l]
Re^4: Printing the length of an array ? by chromatic (Archbishop) on Mar 30, 2008 at 21:57 UTC
That can be wrong for at least one very bad reason that you should be glad you don't know. This code is always correct, shorter, and less noisy: `my $count = @array;`	[reply] [d/l]
Re^5: Printing the length of an array ? by shmem (Chancellor) on Mar 30, 2008 at 22:08 UTC
That can be wrong for at least one very bad reason that you should be glad you don't know. That's so chromatic... and, of course, it does induce a post asking: what bad reason? --shmem _($_=" "x(1<<5)."?\n".q·/)Oo. G°\ / /\_¯/(q / ---------------------------- \__(m.====·.(_("always off the crowd"))."· ");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}	[reply]
Re^6: Printing the length of an array ? by Not_a_Number (Prior) on Mar 30, 2008 at 22:38 UTC
Re^5: Printing the length of an array ? by wardy3 (Scribe) on Mar 31, 2008 at 04:39 UTC
oooooh, but i want to know	[reply]