http://www.math.grin.edu/~ofallonb/Outline.html
http://www.sjmercury.com/news/breaking/docs/062333.htm
as the basis of a talk. You would, however, need to find more
information.
grep
, Revisited
grep
is a program designed to
find lines in a file that match a regular expression.
grep
returns all lines which contain a substring
matched by the regular expression (all lines that contain a
substring that is in the set denoted by the regular expression).
grep options file
grep options
grep options file1 file2 ...
grep
permits a variety of command line switches,
including
-E
to use extended regular expressions.
-v
to negate the match (only nonmatching lines
are printed).
-i
to ignore case differences.
-l
to list files that contain the pattern (but
not print the lines).
-v
flag in our solution.
We would then want to come up with a pattern for "legal lines".
[^<>]
<[^<>]*>
^[^<>]*\(<[^<>]*>[^<>]*\)*[^<>]*$
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