Re: Variable Swap
| From: | derick@php.net | Date: | Tue, 11 Dec 2001 09:35:58 +0000 |
| Subject: | Re: Variable Swap | ||
| References: | 1 | Groups: | php.lang |
| Request: | Send a blank email to php-lang+get-253@lists.php.net to get a copy of this message | ||
On Mon, 10 Dec 2001, Bharath Bhushan Lohray wrote:
> Is there a way of swapping the values of two variables without involving a
> third variable.
>
> something similar to the SWAP(A$,B$) of BASIC
>
> I have a big variable(array) and I want to keep my script's memory
> requirements as low as possible.
Doing this will not copy array's: (PHP only copies if you change it
(copy-on-write))
$v = array(...);
$w = array(...);
$z = $v;
$v = $w;
$w = $z;
regards,
Derick