Re: <OPTION
| From: | Robert Cummings | Date: | Fri, 27 Oct 2006 09:01:01 +0000 |
| Subject: | Re: <OPTION | ||
| References: | 1 2 3 4 5 6 7 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-243736@lists.php.net to get a copy of this message | ||
On Thu, 2006-10-26 at 22:44 +0200, Jochem Maas wrote:
> Robert Cummings wrote:
> > On Thu, 2006-10-26 at 15:31 +0200, Jochem Maas wrote:
> >> bunch of space wasters ;-)
> >>
> >> <?php foreach (range(1, 31) as $d) echo '<option
> >> value="',$d,'"',($d = $selDay?'
> >>
> >> selected="selected"':''),'>',$d,'</option>';
> >> ?>
> >
> > Specifically:
> >
> >> range(1, 31)
> >
> > Memory waster ;)
>
> any idea as to what the damage is as compared to the classic for loop?
Given that a variable probably costs X and that any variable cane be
stored as Y in an array, and an array would cost Z where the Z = X * Y _
1 (Y element + 1 for the array container itself).
Then the range format would cost 31 + 1 (the array itself + 31 entries)
whereas the for loop would cost 1 + 1 (cost to store i + cost to store
endpoint comparison. Thus the damage is about 15*. Given general
computer science consideration, this is a constant and thus practically
neglible.
Cheers
Rob (ps. the above may be completely incoherent since I'm completely
drunk atm after celebrating two friends birthdays tonight).
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