Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling
 
PerlMonks  

Re^5: Why XML not well formed?

by BaldPenguin (Friar)
on Jul 06, 2005 at 17:32 UTC ( #472893=note: print w/replies, xml ) Need Help??


in reply to Re^4: Why XML not well formed?
in thread Why XML not well formed?

First, the parens in the pattern part of the regex collect the value we find, then the $1 in the replace puts it back in. In that respect the follwing regex would do nothing but spin cycles;
$line =~ s/(&)/$1/g;
So, in your regex the first set of parens save the & for later use. But you don't use it, instead you find all of the &s and replace them literaly with "(&)" including the parens.

That said, the regex I posted would work only if no other entites existed. Take a look at the other regexs above, they do a better job of 'thinking' ahead, to prevent possible errors in the future.

Somebody could, and I have seen it done, place other entities in the url, such as:
http://www.test.me/test.pl?me=1&you=1&string=Montréal
In this case the regex I posted would tranlate to Montréal. Not what you want.

Don
WHITEPAGES.COM | INC

Edit by castaway: Closed small tag in signature

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://472893]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others browsing the Monastery: (8)
As of 2023-01-30 11:46 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found

    Notices?