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Full Discussion: awk to print record not equal specific pattern
Top Forums Shell Programming and Scripting awk to print record not equal specific pattern Post 302801955 by Yoda on Thursday 2nd of May 2013 05:54:34 PM
Old 05-02-2013
Quote:
Originally Posted by arm
dear as far as I know nothing wrong with backslash / and not equal ! =
Ok so there is nothing wrong with backslash:
Code:
awk '$2 ~ /[12]0' myfile
 syntax error The source line is 1.
 The error context is
                $2 ~ >>>  /[12]0 <<<

And there is nothing wrong with regexp not matching:
Code:
awk '$2 ! ~/[12]0' myfile
 syntax error The source line is 1.
 The error context is
                $2 ! >>>  ~ <<<

I hope then you have some explanation for above behavior?
This User Gave Thanks to Yoda For This Post:
arm
 

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LEARN ABOUT CENTOS

tcl_backslash

Tcl_Backslash(3)					      Tcl Library Procedures						  Tcl_Backslash(3)

__________________________________________________________________________________________________________________________________________________

NAME

       Tcl_Backslash - parse a backslash sequence

SYNOPSIS

       #include <tcl.h>

       char
       Tcl_Backslash(src, countPtr)

ARGUMENTS

       char *src (in)		    Pointer to a string starting with a backslash.

       int *countPtr (out)	    If countPtr is not NULL, *countPtr gets filled in with number of characters in the backslash sequence, includ-
				    ing the backslash character.
_________________________________________________________________

DESCRIPTION

       The use of Tcl_Backslash is deprecated in favor of Tcl_UtfBackslash.

       This is a utility procedure provided for backwards compatibility with non-internationalized Tcl extensions.  It parses a backslash sequence
       and returns the low byte of the Unicode character corresponding to the sequence.  Tcl_Backslash modifies *countPtr to contain the number of
       characters in the backslash sequence.

       See the Tcl manual entry for information on the valid backslash sequences.  All of the sequences described in the Tcl manual entry are sup-
       ported by Tcl_Backslash.

SEE ALSO

       Tcl(n), Tcl_UtfBackslash(3)

KEYWORDS

       backslash, parse

Tcl									8.1							  Tcl_Backslash(3)
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