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How can I match a pattern in regex that can contain anything (letters,numbers,…) but matches only if it contains an underscore?
Basically I want to match bob_hello but not bobhello.
This seems pretty much like a homework question, so I’m not going to just give you the answer.
But, what you need to do is this:
Write a three part regular expression:
There are other ways, of course – but this will work.