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Full Discussion: Regex question
Top Forums Shell Programming and Scripting Regex question Post 303024036 by boncuk on Thursday 27th of September 2018 10:08:44 AM
Old 09-27-2018
sorry the browswer not putting code tags around the code when I click on button , so I am adding them manually hope it works.
can someone help me on my sed command please?

I am using sun solaris and Linux , what I want is SED to print any string (or output it to a file preferably) that does not have either "01","03","05","07","10" or "11" on the 9th and 10th position .
e.g from the file below I only want these three lines


Code:
433483433339
167710001710
167730600000


Code:
$cat a.txt
 000000001000
 433483433339 <<< print this since 33 is at 9th and 10th pos
 121121211100 
 167710001710 <<< print this since 17 is at 9th and 10th pos
 167735250310
 167735260510
 167735280710
 167730600000 <<< print this since 00 is at 9th and 10th pos

------ Post updated at 10:07 AM ------

Quote:
Originally Posted by Don Cragun
Just using standard sed features and avoiding cases where systems allowing EREs or BREs make a difference, both of the following seem to also do what you want:
Code:
sed -e '/^........0[1357]/d' -e '/^........1[01]/d' a.txt

and:
Code:
sed '/^........0[1357]/d;/^........1[01]/d' a.txt

But, I have no experience with openVMS, so I can't say whether or not either of these will work there.


awesome this one worked

------ Post updated at 10:08 AM ------

how does this command works though .. I understand each parts but how the output of one gets piped to the other?


Code:
sed -e '/^........0[1357]/d' -e '/^........1[01]/d' a.txt

 

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LEARN ABOUT PHP

mb_regex_set_options

MB_REGEX_SET_OPTIONS(3) 						 1						   MB_REGEX_SET_OPTIONS(3)

mb_regex_set_options - Set/Get the default options for mbregex functions

SYNOPSIS

       string mb_regex_set_options ([string  $options = mb_regex_set_options()])

DESCRIPTION

	Sets the default options described by $options for multibyte regex functions.

PARAMETERS

	      o $options
		-  The	options to set. This is a string where each character is an option. To set a mode, the mode character must be the last one
		set, however there can only be set one mode but multiple options.

	      Regex options

	      +-------+-------------------------------+---+---+
	      |Option | 			      |   |   |
	      |       | 			      |   |   |
	      |       | 	   Meaning	      |   |   |
	      |       | 			      |   |   |
	      +-------+-------------------------------+---+---+
	      |  i    | 			      |   |   |
	      |       | 			      |   |   |
	      |       |      Ambiguity match on       |   |   |
	      |       | 			      |   |   |
	      |  x    | 			      |   |   |
	      |       | 			      |   |   |
	      |       | Enables extended pattern form |   |   |
	      |       | 			      |   |   |
	      |  m    | 			      |   |   |
	      |       | 			      |   |   |
	      |       | 			      |   |   |
	      |       |   '.' matches with newlines   |   |   |
	      |       | 			      |   |   |
	      |  s    | 			      |   |   |
	      |       | 			      |   |   |
	      |       | 			      |   |   |
	      |       |   '^' -> 'A', '$' -> ''    |   |   |
	      |       | 			      |   |   |
	      |  p    | 			      |   |   |
	      |       | 			      |   |   |
	      |       | Same as  both  the  m  and  s |   |   |
	      |       | options 		      |   |   |
	      |       | 			      |   |   |
	      |  l    | 			      |   |   |
	      |       | 			      |   |   |
	      |       |     Finds longest matches     |   |   |
	      |       | 			      |   |   |
	      |  n    | 			      |   |   |
	      |       | 			      |   |   |
	      |       |     Ignores empty matches     |   |   |
	      |       | 			      |   |   |
	      |  e    | 			      |   |   |
	      |       | 			      |   |   |
	      |       |    eval(3) resulting code     |   |   |
	      |       | 			      |   |   |
	      +-------+-------------------------------+---+---+
	      Regex syntax modes

	      +-----+----------------------------+---+---+
	      |Mode |				 |   |	 |
	      |     |				 |   |	 |
	      |     |	       Meaning		 |   |	 |
	      |     |				 |   |	 |
	      +-----+----------------------------+---+---+
	      | j   |				 |   |	 |
	      |     |				 |   |	 |
	      |     | Java (Sun java.util.regex) |   |	 |
	      |     |				 |   |	 |
	      | u   |				 |   |	 |
	      |     |				 |   |	 |
	      |     |	      GNU regex 	 |   |	 |
	      |     |				 |   |	 |
	      | g   |				 |   |	 |
	      |     |				 |   |	 |
	      |     |		 grep		 |   |	 |
	      |     |				 |   |	 |
	      | c   |				 |   |	 |
	      |     |				 |   |	 |
	      |     |		Emacs		 |   |	 |
	      |     |				 |   |	 |
	      | r   |				 |   |	 |
	      |     |				 |   |	 |
	      |     |		 Ruby		 |   |	 |
	      |     |				 |   |	 |
	      | z   |				 |   |	 |
	      |     |				 |   |	 |
	      |     |		 Perl		 |   |	 |
	      |     |				 |   |	 |
	      | b   |				 |   |	 |
	      |     |				 |   |	 |
	      |     |	  POSIX Basic regex	 |   |	 |
	      |     |				 |   |	 |
	      | d   |				 |   |	 |
	      |     |				 |   |	 |
	      |     |	 POSIX Extended regex	 |   |	 |
	      |     |				 |   |	 |
	      +-----+----------------------------+---+---+
RETURN VALUES

	The previous options. If $options is omitted, it returns the string that describes the current options.

SEE ALSO

       mb_split(3), mb_ereg(3), mb_eregi(3).

PHP Documentation Group 												   MB_REGEX_SET_OPTIONS(3)
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