Two questions have identical titles:

Regex expression using word boundary for matching alphanumeric and non alphanumeric characters in javascript

The URL's are also identical: https://stackoverflow.com/questions/4215468/regex-expression-using-word-boundary-for-matching-alphanumeric-and-non-alphanume and
https://stackoverflow.com/questions/4214204/regex-expression-using-word-boundary-for-matching-alphanumeric-and-non-alphanume Well, not quite! They have different numeric identifiers, at least I assume that is the purpose of the number in the URL. Note also that the question content in both is similar in meaning, although not identically worded. Why isn't this a bug?
I just noticed that the questions were merged. However they both were displayed in a list of similar questions, one beneath the other, on a recent regex question (sorry, I should have taken a screen shot).

If questions have been merged, should they still display separately in the related question column?

EDIT #2 Sorry it took so long. And kind of fuzzy! an example of merged files still appearing

  • 3
    This is when you flag the question as a duplicate. Feb 28, 2012 at 22:55
  • "not quite identical" == different, doesn't it?
    – vascowhite
    Feb 28, 2012 at 22:57
  • 4
    I'm pretty sure the system prevents duplicated titles now... It probably wouldn't let you finish editing them (if you tried) without changing the title to something unique.
    – animuson StaffMod
    Feb 28, 2012 at 23:38
  • Yes, merged questions could possibly be displayed in a list of questions as two separate questions. Feb 29, 2012 at 2:14
  • @animuson yes, duplicate titles are expressly forbidden now on any given SE site. One of those 'we should have thought of this 2 years ago' ideas.. Feb 29, 2012 at 10:30
  • 2
    As for your question in EDIT #2: the linked list is cached and only rebuilt when a question is edited, or every 30 days. (As an aside: please, one question per question in future posts, and don't be afraid to edit posts rather than just adding stuff!)
    – Arjan
    Feb 29, 2012 at 22:37


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