I am fairly sure that 1 and 3 are equivalent (although written differently). I have been using one or the other syntax many times.
I would *think* that 2 is also doing the same, but there might be some edge case where it differs from the other two (although I can't think of any at the moment).
In reply to Re: Difference between these regexes
by Laurent_R
in thread Difference between these regexes
by haukex
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