Using arrays for look-ups

[Jaz]

Hi,

Just a quick sanity check...

Sometimes it's useful to use an array as a kind of reverse lookup. For
example, the indexes being productIDs and the value being it's name.

If I do something like this...

$x = array();
$x[1] = 'foo';
$x[345] = 'foo';
$x[12345] = 'foo';

.... PHP is intelligent enough only to allocate 3 data chunks for this right?
As I type this, it seems far more obvious, but if someone could just
confirm :-) Thanks!

J.

[Daniel]

Re: Using arrays for look-ups


"Jaz" <xx@xx.com> wrote in message news:bgmksj$ksq $2@news6.svr.po l.co.uk...[color=blue]
> Hi,
>
> Just a quick sanity check...
>
> Sometimes it's useful to use an array as a kind of reverse lookup. For
> example, the indexes being productIDs and the value being it's name.
>
> If I do something like this...
>
> $x = array();
> $x[1] = 'foo';
> $x[345] = 'foo';
> $x[12345] = 'foo';
>
> ... PHP is intelligent enough only to allocate 3 data chunks for this[/color]
right?[color=blue]
> As I type this, it seems far more obvious, but if someone could just
> confirm :-) Thanks!
>
> J.
>[/color]


Yeah that's right. sizeof($x) will return 3 and NOT 12346. :-)

/D