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Date: Fri, 31 Aug 2012 13:11:01 -0400
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To: Ferenc Kovacs <tyra3l@gmail.com>
Cc: internals@lists.php.net
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Subject: Re: [PHP-DEV] Support negative indexes for arrays and strings
From: rasmus@mindplay.dk (Rasmus Schultz)

Yes, typo! sorry.

     $array =3D array(1001, 1002, 1003, 1004);
     $number =3D $array[-1]; // =3D> 1004
     $array[-1] =3D 1005;
     $number =3D $array[-1]; // =3D> ????

Looking at the resulting code, I would like to point out also that
it's extremely misleading... because $array[-1] references two
completely different elements depending on whether you're reading or
writing the value... unless $array[-1] =3D 1005 would actually overwrite
the last element in the array - in which case it gets even more
dangerous, as well as breaking backwards compatibility...


On Fri, Aug 31, 2012 at 9:24 AM, Ferenc Kovacs <tyra3l@gmail.com> wrote:
>
>
> On Fri, Aug 31, 2012 at 3:14 PM, Rasmus Schultz <rasmus@mindplay.dk> wrot=
e:
>>
>> Having thought about this for a while, I think this is a bad idea - here=
's
>> why:
>>
>>     $array =3D array(1001, 1002, 1003, 1004);
>>
>>     $number =3D $array[-1]; // =3D> 1004
>>
>>     $number[-1] =3D 1005;
>>
>>     $number =3D $array[-1]; // =3D> ????
>>
>> Obviously, the last statement must return 1005, since otherwise that
>> value would be inaccessible.
>>
>
> maybe you wanted to write
> $array[-1] =3D 1005;
> instead of
> $number[-1] =3D 1005;
> ?
>
> otherwise I can't see the problem that you are mentioning.
> could you clarify?
>
> --
> Ferenc Kov=E1cs
> @Tyr43l - http://tyrael.hu