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Top Forums Shell Programming and Scripting Remove all matches containing a string until its next space Post 303032892 by MadeInGermany on Tuesday 26th of March 2019 08:16:06 AM
Old 03-26-2019
The previous sample matches and removes leading space.
It's also possible with trailing space. With portable perl one can even include TABs
Code:
perl -pe 's/linux-\S+\s+//g'

Most exact is a "begin anchor" and trailing space becomes optional
Code:
perl -pe 's/(^|\s)linux-\S+\s*//g'

A recent GNU-Linux like Ubuntu can use sed -r instead of the perl -pe.
Just seeing the latter sample does not work because the trailing \s* consumes the leading space for a subsequent match.
Because I have no good idea for a fix, here is again one with leading spaces (and also allowing the beginning of the line):
Code:
perl -pe 's/(^|\s)linux-\S+//g'


Last edited by MadeInGermany; 03-27-2019 at 07:22 AM..
This User Gave Thanks to MadeInGermany For This Post:
 

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Tcl_StringMatch(3)					      Tcl Library Procedures						Tcl_StringMatch(3)

__________________________________________________________________________________________________________________________________________________

NAME
Tcl_StringMatch, Tcl_StringCaseMatch - test whether a string matches a pattern SYNOPSIS
#include <tcl.h> int Tcl_StringMatch(string, pattern) int Tcl_StringCaseMatch(string, pattern, nocase) ARGUMENTS
char *string (in) String to test. char *pattern (in) Pattern to match against string. May contain special characters from the set *?[]. int nocase (in) Specifies whether the match should be done case-sensitive (0) or case-insensitive (1). _________________________________________________________________ DESCRIPTION
This utility procedure determines whether a string matches a given pattern. If it does, then Tcl_StringMatch returns 1. Otherwise Tcl_StringMatch returns 0. The algorithm used for matching is the same algorithm used in the ``string match'' Tcl command and is similar to the algorithm used by the C-shell for file name matching; see the Tcl manual entry for details. | In Tcl_StringCaseMatch, the algorithm is the same, but you have the option to make the matching case-insensitive. If you choose this (by | passing nocase as 1), then the string and pattern are essentially matched in the lower case. KEYWORDS
match, pattern, string Tcl 8.1 Tcl_StringMatch(3)
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