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Re: How to construct an associative and numeric indexable array

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"Thomas 'PointedEars' Lahn" <PointedEars@web.de> escribió en el mensaje 
news:1908618.nuHmqJ5PAb@PointedEars.de...
> Leonardo Azpurua wrote:
>
>> "Michael Fesser" [wrote]:
>>> .oO(Leonardo Azpurua)
>>>> But when you use the array returned by sqlsrv_fetch_array, you can
>>>> either write $arr["C1"] or $arr[0].
>>>> Do you know how they do that?
>>>
>>> Such an array contains all values twice. There's no direct way to access
>>> an element with an associative key also by a numeric index. For doing
>>> that you would have to loop through the array until you've reached the
>>> element you want.
>>
>> So that's how they do it!
>>
>> I just checked and in fact count($row) yields twice the number of columns
>> in the result set.
>>
>> And it is anything but appealing as a "general" solution.
>
> However, the array can also be created so that the value with the numeric
> key is a reference to the value with the non-numeric key, or vice-versa.
> Thereby the memory footprint of the array may be reduced; at least,
> inconsistencies are avoided:
>
> $ php -v
> PHP 5.3.10-1 (cli) (built: Feb  3 2012 10:03:01)
> Copyright (c) 1997-2012 The PHP Group
> Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies
>    with XCache v1.3.2, Copyright (c) 2005-2011, by mOo
>    with Xdebug v2.1.0, Copyright (c) 2002-2010, by Derick Rethans
>    with Suhosin v0.9.32.1, Copyright (c) 2007-2010, by SektionEins GmbH
>
> $ phpsh -c
> php> $a = array(); $a['foo'] = 'bar'; $a[0] =& $a['foo']; print_r($a);
> Array
> (
>    [foo] => bar
>    [0] => bar
> )
>
> php> $a[0] = 'baz'; print_r($a);
> Array
> (
>    [foo] => baz
>    [0] => baz
> )

A nice solution, thanks!

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Thread

How to construct an associative and numeric indexable array "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-05-25 18:49 -0430
  Re: How to construct an associative and numeric indexable array Jerry Stuckle <jstucklex@attglobal.net> - 2012-05-25 20:08 -0400
    Re: How to construct an associative and numeric indexable array "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-05-25 22:39 -0430
      Re: How to construct an associative and numeric indexable array Jerry Stuckle <jstucklex@attglobal.net> - 2012-05-26 00:04 -0400
        Re: How to construct an associative and numeric indexable array "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-05-25 23:57 -0430
          Re: How to construct an associative and numeric indexable array Michael Fesser <netizen@gmx.de> - 2012-05-26 13:00 +0200
            Re: How to construct an associative and numeric indexable array "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-05-26 09:13 -0430
              Re: How to construct an associative and numeric indexable array Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-05-27 00:31 +0200
                Re: How to construct an associative and numeric indexable array "Leonardo Azpurua" <leonardo@exmvps.org> - 2012-05-26 22:14 -0430
                Re: How to construct an associative and numeric indexable array Norman Peelman <npeelmandog@cfl.rr.com> - 2012-05-27 12:12 -0400
                Re: How to construct an associative and numeric indexable array Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-05-27 19:48 +0200
                Re: How to construct an associative and numeric indexable array Norman Peelman <npeelmandog@cfl.rr.com> - 2012-05-29 18:27 -0400
              Re: How to construct an associative and numeric indexable array Norman Peelman <npeelmandog@cfl.rr.com> - 2012-05-27 12:03 -0400

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