<div>
This is a fairly complex regular expression.<br />
<br />
Easy to do in PERL.<br />
<br />
In Adobe... Whew... Likely best to rename each file with a set of regular expressions, each rename pruning cruft, till only your desired text remains in each file.<br />
<br />
Complex.<br />
<br />
I'd personally use PERL + have it work the first time.
</div>


This is a fairly complex regular expression.

Easy to do in PERL.

In Adobe... Whew... Likely best to rename each file with a set of regular expressions, each rename pruning cruft, till only your desired text remains in each file.

Complex.

I'd personally use PERL + have it work the first time.

<div>
<i>For some reason my comment didn’t show up, so I’ll write it again...</i><br />
<br />
You’re solution works perfectly, Dan - thanks very much!<br />
<br />
Cheers,<br />
Andrea
</div>


For some reason my comment didn’t show up, so I’ll write it again...

You’re solution works perfectly, Dan - thanks very much!

Cheers,
Andrea

<div>
<div class="content wysiwyg-content">
I am using Adobe Bridge to batch rename 130 files in a folder. It can handle regular expressions, so I am looking for the correct expression to achieve the following:<br />
<br />
Original filename formats:<br />
127155aaaa_58_Road to Cottage Lake Black.jpg<br />
001000_Cottage Map.jpg<br />
<br />
Description of revised filename:<br />
Starting from left of entire filename -- Retain first 3 numbers of original filename<br />
Starting from the left of '.jpg' file extension -- retain all text and spaces to left, up to and including the first instance of &quot;_&quot;<br />
Retain &quot;.jpg&quot; file extension<br />
<br />
Desired filename after batch renaming:<br />
127_Road to Cottage Lake Black.jpg<br />
001_Cottage Map.jpg<br />
<br />
I hope I've provided enough details.<br />
<br />
Thanks,<br />
Andrea
</div>
</div>


I am using Adobe Bridge to batch rename 130 files in a folder. It can handle regular expressions, so I am looking for the correct expression to achieve the following:

Original filename formats:
127155aaaa_58_Road to Cottage Lake Black.jpg
001000_Cottage Map.jpg

Description of revised filename:
Starting from left of entire filename -- Retain first 3 numbers of original filename
Starting from the left of '.jpg' file extension -- retain all text and spaces to left, up to and including the first instance of "_"
Retain ".jpg" file extension

Desired filename after batch renaming:
127_Road to Cottage Lake Black.jpg
001_Cottage Map.jpg

I hope I've provided enough details.

Thanks,
Andrea

Finding correct regular expression to batch rename 130 files

A regular expression ("regex") is a sequence of characters that define a search pattern, mainly for use in pattern matching with strings, or string matching, i.e. "find and replace"-like operations. Regular expression processors are found in several search engines, search and replace dialogs of several word processors and text editors, and in the command lines of text processing utilities, such as sed and AWK. Many programming languages provide regular expression capabilities, some built-in, for example Perl, JavaScript, Ruby, AWK, and Tcl, and others via a standard library, for example .NET languages, Java, Python and C++ (since C++11). Most other languages offer regular expressions via a library.