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Re: Regex Anchors confusion

by inman (Curate)
on May 18, 2005 at 14:23 UTC ( [id://458225] : note . print w/replies, xml ) Need Help??


in reply to Regex Anchors confusion

The second test is looking for a word boundary, followed by a space, followed by a word boundary, followed by the end of the string.

The pattern doesn't match your data. I can't immediately think of a situation where / \b$/ would ever match.

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Re^2: Regex Anchors confusion
by japhy (Canon) on May 18, 2005 at 15:14 UTC
    Since \b matches in between a word character and a non-word character, / \b$/ can never match.

    Jeff japhy Pinyan, P.L., P.M., P.O.D, X.S.: Perl, regex, and perl hacker
    How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart
      Well, technically, \b matches between a word character, and the failure to match a word character (such as the edge of a string). I know you know that. This is for others that are following along at home. {grin}

      So, there are four pairs: word-word, word-nonword, edge-word, edge-nonword. \b matches the middle two of those, and \B matches the outer two of those.

      -- Randal L. Schwartz, Perl hacker
      Be sure to read my standard disclaimer if this is a reply.