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Date: Sat, 14 Jul 2012 11:34:24 +0100
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To: Anthony Ferrara <ircmaxell@gmail.com>
Cc: Stas Malyshev <smalyshev@sugarcrm.com>, Brandon Wamboldt <brandon.wamboldt@gmail.com>, 
	Andrew Faulds <ajfweb@googlemail.com>, internals <internals@lists.php.net>
Content-Type: text/plain; charset=ISO-8859-1
Subject: Re: [PHP-DEV] Re: array_last_key() function
From: dragoonis@gmail.com (Paul Dragoonis)

On Sat, Jul 14, 2012 at 3:04 AM, Anthony Ferrara <ircmaxell@gmail.com> wrote:
> Stas,
>
>> I like this idea. array_first_key would be nice too
>>
>> I am probably missing something, but what those would allow to do that
>> rewind/end+key() doesn't do?
>>
>
> The big thing that it does that end()+key() doesn't do is really what it
> doesn't do (update the internal pointer).
>
> end() modifies the array pointer. So if you try this in user-land:
>
> function array_last_key(array $array) {
>     end($array);
>     return key($array);
> }
>
> It will always force a full copy of the array (at least the hash table).
> Implementing this as a core function however would eliminate that one
> side-effect...

and it beats doing $var = null; if(isset($array[0])) { $var = $array[0]; }