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Help with exclusion regex

 
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eidolen



Joined: 15 Apr 2008
Posts: 11

PostPosted: Sat Sep 05, 2009 7:10 pm    Post subject: Help with exclusion regex Reply with quote

Haven't been around for a while now so I think I got a little rusty. :\

I'm having trouble creating a regex that would apply to all *unless* it is enclosed by any type of bracket.

ie. change all Underscore marks with spaces unless that underscore is enclosed within brackets. I know I've done similar regex before, but now I'm just stumped.

Any help is much appreciated.

Cheers
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admin
Site Admin


Joined: 09 Mar 2007
Posts: 446
Location: Canada

PostPosted: Mon Sep 07, 2009 3:36 am    Post subject: Reply with quote

Hi,

I can't think of an elegant way to do this. A crude way is shown below. To try it copy the search/replace expressions into the appropriate rows/columns (but don't copy the enclosing single quotes).

Row: 1
Search: '(.*)(\(.*?)_(.*\))(.*)'
Replace: '\1\2xxx\3\4'
Row: 2
Search: '(.*)(\(.*?)_(.*\))(.*)'
Replace: '\1\2xxx\3\4'
Row: 3
Search: '_'
Replace: ' '
Row: 4
Search: 'xxx'
Replace: '_'

The first row replaces the first '_' found within a set of parentheses with the characters xxx. The second row is identical and is used in case there is a second occurence. You can add repeat the row as many times as required.
WHen the third row executes, it is assumed that the only '_' characters left are outside any enclosing parentheses and therefore changes each '_ to a blank. The fourth row changes back the xxx's to '_'.
You can replace the xxx with another string if you want in case xxx can occur natually in the filenames.

Hope this helps.

Peter.
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eidolen



Joined: 15 Apr 2008
Posts: 11

PostPosted: Mon Sep 07, 2009 11:35 am    Post subject: Reply with quote

Thanks Peter,
I ended up coming up with a similar solution but thought I was missing something obvious to do it one go. At least I don't feel so bad about myself now. =D

Hope you have a great holiday,
Cheers
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