SPUG: SQL syntax Regular Expression
Colin Meyer
cmeyer at helvella.org
Wed Jun 19 19:34:20 CDT 2002
On Thu, Jun 20, 2002 at 12:21:17AM +0000, Dan Sanderson wrote:
>
> This may or may not be worth mentioning in this particular case, but since
> I learned this lesson the hard way, I feel like mentioning it every time I
> see $` and $' (and $&) mentioned. From camel, 24.2.1:
>
> Avoid $& and its two buddies, $` and $'. Any occurrence in your program
> causes all matches to save the searched string for possible future
> reference. (However, once you've blown it, it doesn't hurt to have more
> of them.)
>From perldoc perlre:
As of 5.005, $& is not so costly as the other two.
Have fun,
-C.
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