"Li, Jialin" schreef:
> On Wed, May 14, 2008 at 4:01 PM, Tech list
> <tech_list@womenshealth.com> wrote:
>
>> what is the correct way to get the number of items in an array?
>>
>> I used to use $#array
>>
>>
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>
> $#array is the index of the last item, so the number should be
> $#array + 1, or
> scalar @array

Please read perlvar about $[. Normally it is 0, but you can set it to a
different value, like -3 or 27.

The $#array is the last index of @array, so $array[$#array] is
equivalent to $array[-1].

The number of items in an array is returned by @array in scalar context,
examples:

    scalar(@array)

    (0+ @array)

    if (0 < @array) { ... }

    if (@array) { ... }

-- 
Affijn, Ruud

"Gewoon is een tijger."