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I want to find a string in 3 types of inputs :

  1. Client XXX.MYDOMAIN.COM is
  2. Client YYY is
  3. Client ZZZ.mydomain.com is

What I want is :

  1. XXX
  2. YYY
  3. ZZZ

Can someone help me with this. Thank you.

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4
  • 1
    What have you tried already, and whats wrong with just looking for the second word? Commented Apr 3, 2014 at 18:26
  • So basically you want to match the word after Client ? Commented Apr 3, 2014 at 18:28
  • I want to match the word between 'Client' and 'is' . What I just found is the regex does not match if the there is dot(.) as part of the name. Commented Apr 4, 2014 at 14:42
  • Breaking apart components of a hostname is a solved problem. There is probably existing code that has been written, tested and debugged in whatever language you are using. Commented Apr 4, 2014 at 17:55

2 Answers 2

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Try this regex:

(?<=Client\s)\b\w+\b

see demo here: http://regex101.com/r/lQ9hD0

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1

This matches to the 3 example strings after Client:

Client (XXX|YYY|ZZZ)

Or if you would like to match anything 3 character:

Client (...)
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1 Comment

...or Client\s+(\w+). The main point is, capturing groups are more widely supported than lookbehinds, and much more flexible.

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