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Find and Replace Regex question please

Find and Replace Regex question please

Find and Replace Regex question please

Hi all

After a bit of help again please

Every day I have to go through a 3-400 Mb XML formatted file correcting errors. Some of these can be done using standard find/replace however
I have a set of issues where I guess Regex is better placed to help as I need to identify and replace /'s which of course is also on every close tag.......
problem is I'm very new to regex and need some pointers/advice please

Being XMl it contains the start/end tags which also contain the / character I need to remove however some of the fields will only accept A-Z0-9 as valid input

i.e. <Ref>1234/567890</Ref> the other block is that the numbers are random....

I need to first identify the tags which contain this error which Ive been able to do using a find for "<Ref>[0-9]{4}/" and I then manually correct the
data - fine if you find 3 or 4..but finding 100 + its a bit of a b****r.....

knowing that's its always inside the <Ref> tags what I need too be able to do is to Remove the in-between tag /'s leaving just the numbers
i.e <Ref>1234567890</Ref>

Can anyone help/provide any pointers of how or indeed if this can be done..?

Many thanks (Apologies if this is in the wrong forum but this Perl forum provided a good deal of Regex help....)

Replies continue below

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RE: Find and Replace Regex question please


Are you sure there will be always only one and only slash ?

Anyway here I added 3 regular expressions, play with commenting them out to see which one you need :

CODE --> Perl

use strict;
use warnings;

my $xml = do { local $/; <DATA> };

# assume there is at most 1 slash there
$xml =~ s:(<Ref>\d*)/:$1:g;

# remove any amount of slashes
$xml =~ s:(<Ref>)(.+?)(</Ref>):$1.$2=~y!/!!dr.$3:ge;

# remove any amount of non-digit characters
$xml =~ s:(?<=<Ref>).+?(?=</Ref>):$&=~s!\D!!gr:ge;

print $xml;



RE: Find and Replace Regex question please

Feherke, Thank you for your detailed answer..much appreciated

Unfortunately Ive discovered were not going to be allowed to install/Run Perl.......

We do have NotePad++ (in its basic install form i.e no xmltools plugin etc) so can anyone suggest please how we can maybe use regex to remove any /'s (or -'s or *'s etc) that appear between <Ref></Ref> tags whilst still maintaining the standard xml tags and keeping the rest of the data?

i.e. <Ref>1234/567890</Ref>

We've seen that we can have 4 number/then 8+ numbers or 3numbers/numbers... so no fixed standard bar the (so far) single / between the <Ref> tags that shouldn't/we don't want to be there....

We know we can do an initial change for </ to <# then change all / to "" then change <# back to </ but that's not really "safe/feasible" on what's now a 1.7million row xml file and makes a massive assumption that there's not /'s elsewhere.........

Cheers and Thanks again

RE: Find and Replace Regex question please


Never used NotePad++ earlier, but this way works for my test data :
Find what : (<Ref>\d*)[/*]
Replace with : $1

However I would say for files of that size better use a dedicated tool instead of a text editor. In thread215-1789240: Inserting same line of text of every web page - "link" insert? our fellow member spamjim recommended grepWin as such tool. Better see whether you can get approval to install it ( or maybe already have it... ).


RE: Find and Replace Regex question please

Nice example about using regular expressions in Perl.
Today I learned something from you again. You deserve the star.

RE: Find and Replace Regex question please

Just curious, why don't they allow Perl to be used? I work for a multi billion dollar company and we use a number of scripting languages including Perl. If they don't want it installed on the network, there are many free versions that can be installed on windows. Activestate is a good one. I say windows because the POSEX systems like Unix, Solaris, and Linux (among other) come with Perl in the base install.

Lead Application Developer
New York State, USA

RE: Find and Replace Regex question please

Thanks for your help...
I work for a "bank" meaning that everythings controlled/locked down etc etc so no additional software whether its free or not....so have to make do with the tools available and notepad++ is the tool of choice..

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