Regex Problem Group Name Redefinition?

Question

So I have this regex:

(^(\\s+)?(?P(\\w)(\\d{7}))((01f\\.foo)|(\\.bar|\\.goo\\.moo\\.roo))$|(^(\\s+)?(?PR1_\\d{6}_\\d{6}_)((01f\\.foo)|(\         


        

Answer 1

No, you can't have two groups of the same name, this would somehow defy the purpose, wouldn't it?

What you probably really want is this:

^\s*(?P\w\d{7}|R1_(?:\d{6}_){2})(01f\.foo|\.(?:bar|goo|moo|roo))$

I refactored your regex as far as possible. I made the following assumptions:

You want to (correct me if I'm wrong):

• ignore white space at the start of the string
• match either of the following into a group named "NAME":
  • a letter followed by 7 digits, or
  • "R1_", and two times (6 digits + "_")
• followed by either:
  • "01f.foo" or
  • "." and ("bar" or "goo" or "moo" or "roo")
• followed by the end of the string

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You could also have meant:

^\s*(?P\w\d{7}01f|R1_(?:\d{6}_){2})\.(?:foo|bar|goo|moo|roo)$

Which is:

• ignore white space at the start of the string
• match either of the following into a group named "NAME":
  • a letter followed by 7 digits and "01f"
  • "R1_", and two times (6 digits + "_")
• a dot
• "foo", "bar", "goo", "moo" or "roo"
• the end of the string