Re^2: delete lines till

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Re^3: delete lines till by Anonymous Monk on Aug 25, 2009 at 10:54 UTC
Why don't you install YAPE::Regex::Explain? The regular expression: (?m-isx:\A.\nD$) matches as follows: NODE EXPLANATION ---------------------------------------------------------------------- (?m-isx: group, but do not capture (with ^ and $ matching start and end of line) (case- sensitive) (with . not matching \n) (matching whitespace and # normally): ---------------------------------------------------------------------- \A the beginning of the string ---------------------------------------------------------------------- . any character except \n (0 or more times (matching the most amount possible)) ---------------------------------------------------------------------- \n '\n' (newline) ---------------------------------------------------------------------- D 'D' ---------------------------------------------------------------------- $ before an optional \n, and the end of a "line" ---------------------------------------------------------------------- ) end of grouping ---------------------------------------------------------------------- [download]	[reply] [d/l]

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Re^3: delete lines till
by Anonymous Monk on Aug 25, 2009 at 10:54 UTC

YAPE::Regex::Explain

The regular expression:

(?m-isx:\A.*\nD$)

matches as follows:

NODE                     EXPLANATION
----------------------------------------------------------------------
(?m-isx:                 group, but do not capture (with ^ and $
                         matching start and end of line) (case-
                         sensitive) (with . not matching \n)
                         (matching whitespace and # normally):
----------------------------------------------------------------------
  \A                       the beginning of the string
----------------------------------------------------------------------
  .*                       any character except \n (0 or more times
                           (matching the most amount possible))
----------------------------------------------------------------------
  \n                       '\n' (newline)
----------------------------------------------------------------------
  D                        'D'
----------------------------------------------------------------------
  $                        before an optional \n, and the end of a
                           "line"
----------------------------------------------------------------------
)                        end of grouping
----------------------------------------------------------------------
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