Reg expression help please... 2

[nickroper]

Hi,

I have a regular expression that converts newline characters to '<BR>'. I need to modify this so that it only converts the newline characters if they are not preceeded by certain other strings ('table>', 'td>' and 'tr>')

So, examples would be as follows:

original string:

'line1\n line2\n line3'

would be converted to:

'line1<BR> line2<BR> line3'

Whereas:

'<table>\n<tr>\<td>line1\nline2\nline3</td>\n</tr>\n</table>'

would be converted to:

'<table>\n<tr>\<td>line1<BR>line2<BR>line3</td>\n</tr>\n</table>'

My existing expression is:

$foo =~ s/\n/<BR>/g;

which converts ALL occurrences of \n. If any regex gurus out there can let me know the trick to ignore \n preceeded by 'table>', 'td>' and 'tr>' (I've left the opening bracket off in order to catch both openng and closing tags) then I'd be extremely grateful.

Cheers,

Nick Roper

 

[duncdude]

Cheers Trojan!

No bike = misery :-(

Nick

try using single quotes around your string - not double speech marks


Kind Regards
Duncan

 

[nickroper]

Just noticed that my initial string was double-quoted so that meta-characters are expanded. Should this make a difference as far as the regex is concerned ?

Nick

 

[nickroper]

OK, I've got it.

I modified the expression to un-escape the '\' in front of the 'n'. Your expression worked perfectly with the examples that I gave - which were single quoted strings, but I didn't mention that $foo is actually read from a file and that the \n would be a real newline sequence rather that a literal '\n'

Thanks again for the help - now I can go for that pint of Butcombe...

Cheers,

Nick

 

[stevexff]

Duncan

Off-topic I know, but how did you post the picture? I visit the OO design forum a lot, and sometimes a diagram is worth a thousand words, and certainly much easier than trying to 'draw' one with |+><- characters inside

 tags.

Nice bike, BTW. I hadn't ridden one for about 8 years, but rented some scooters on holiday earlier this year. I'd forgotten how much fun it was. Hmmm, maybe next spring...