Sorry �� ��������, ��� ��� regexp oops�� �� �������� �������� :-)
On Thu, Nov 09, 2000 at 03:58:01PM +0200, Alexandr Belonogov wrote:
> ��� �������� �� man regexp
������ man� �� Linux ����������.
> In general there may be more than one way to match a regular expression to an
> input string. For example, consider the command
> regexp (a*)b* aabaaabb x y
> Considering only the rules given so far, x and y could end up with the values
> aabb and aa, aaab and aaa, ab and a, or any of several other combinations.
REGULAR EXPRESSION SYNTAX
A regular expression is zero or more branches, separated by `|'. It
matches anything that matches one of the branches.
A branch is zero or more pieces, concatenated. It matches a match for
the first, followed by a match for the second, etc.
A piece is an atom possibly followed by `*', `+', or `?'. An atom fol-
lowed by `*' matches a sequence of 0 or more matches of the atom. An
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
�.�. n* ��� �����, n, nn, nnnn
� .* ��� ����� ������ ����������� 0 � ����� ���
�.�. n*.* ����� ���� ���� sssss
atom followed by `+' matches a sequence of 1 or more matches of the atom.
An atom followed by `?' matches a match of the atom, or the null string.
� ��� � ������:
linux:~/Mail> cat >test
aaaa
bbbb
nffff
nnnnnn
bas
linux:~/Mail> grep '^n*.*' test
aaaa
bbbb
nffff
nnnnnn
bas
linux:~/Mail>
���������� ���������� ��������� ��������� �� � ���� ������ ������� :-)
��������� ����������, man etc. �� ����� ������ regexp ���� �����, ���
�� ������ ��� �� DOS/Windows/NT. �� �� ���� �������. ��� �� ����
���������� �������.
--
Igor Roboul, Unix System Administrator & Programmer @ sanatorium "Raduga",
Sochi, Russia
http://www.brainbench.com/transcript.jsp?pid=304744
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