Gerard Robin wrote:
> Hello,
Hello,
> in a script I can write:
>
> if (
> ....
> $subject =~ /phar/i or
> $subject =~ /phfar/i or
> $subject =~ /phhar/i or
> $subject =~ /phya/i or
> $subject =~ /photo/i
> ....
>
> ){..}
>
> "or"
>
> if (
> ....
> $subject =~ /ph(ar|far|har|ya|oto)/i
> ....
> ){...}
>
> "or"
>
> if (
> ....
> $subject =~ qr(ph(ar|far|har|ya|oto))i
> ....
> ){...}
>
> I wonder which one of these forms is faster ?
The first one should be faster. Of course you could use the Benchmark module
to find out for sure.
> About qr :
>
> if I do :
>
> $match = qr(ph(ar|far|har|ya|oto));
>
> print ref $match, $/;
>
> I get the output:
>
> Regexp
>
> What is $match exactly ?
It is a compiled regular expression.
John
--
use Perl;
program
fulfillment
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