http://qs321.pair.com?node_id=1176780


in reply to Re: Regular Expression: search two times for the same number of any signs
in thread Regular Expression: search two times for the same number of any signs

Hi hippo

Unfortunately, this approach violates the spec: the second 'x' might qualify for a "." ("any sign"), and might not indicate the middle of the string.

So long, Rata

  • Comment on Re^2: Regular Expression: search two times for the same number of any signs

Replies are listed 'Best First'.
Re^3: Regular Expression: search two times for the same number of any signs
by hippo (Chancellor) on Nov 29, 2016 at 10:31 UTC

    If that's really the case (and you are probably right) then maybe change the order: find the first and last occurrence of 'x', calculate where the middle one should be and look there?

    However, the spec is a little woolly and the whole thing is still shouting "XY!" at me.