Re: fastest way to substitute

[John W. Krahn]

Jeff 'Japhy' Pinyan wrote:
> 
> On Jul 27, Paul Tremblay said:
> 
> >The only problem is how I should replace "&", ">", and "<". I think I'll
> >do single line subs for this text. Even with huge files it shouldn't
> >take more than 1/2 a second or so, and that allows me to use your
> >original method to speed things up.
> >
> >Or this just occurred to me:
> >
> >s[(&)|(<)|(>)|\\($rx)][<$rep{$1}/>]go;
> >
> >Yea, that should work!
> 
> No, $1 is either "&" or undef.  Perhaps you want:
> 
>   s[([&<>])|\\($rx)][<$rep{$+}/>]go;
> 
> That $+ means "the last () that matched".  But that still replaces & with
> <&amp;/>.  So you'd need to make the '<' and '/>' part of the %rep hash's
> values.  I would suggest:

I thought '<' and '/>' were already in the hash values?  If so, wouldn't
this work?

  s[([&<>]|(?<=\\)$rx)][$rep{$1}]go;



John
-- 
use Perl;
program
fulfillment

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