Regex to replace email address domains?

Question

I need a regex to obfuscate emails in a database dump file I have. I\'d like to replace all domains with a set domain like @fake.com so I don\'t risk sending ou

Answer 1

SublimeText

SublimeText uses Boost syntax, which supports quite a large subset of features in Perl regex. But for this task, you don't need all those advanced constructs.

Below are 2 possible approaches:

1. If you can assume that @ doesn't appear in any other context (which is quite a fair assumption for normal text), then you can just search for the domain part @[A-Z0-9.-]+\.[A-Z]{2,4}\b and replace it.

2. If you use capturing groups (pattern) and backreference in replacement string.

   Find what

   \b([A-Z0-9._%-]+)@[A-Z0-9.-]+\.[A-Z]{2,4}\b
   

   ([A-Z0-9._%-]+) is the first (and only) capturing group in the regex.

   Replace with

   $1@fake.com
   

   $1 refers to the text captured by the first capturing group.

Note that for both methods above, you need to turn off case-sensitivity (indicated as the 2nd button on the lower left corner), unless you specifically want to remove only emails written in ALL CAPS.