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Full Discussion: awk gsub(): general regex
Top Forums UNIX for Dummies Questions & Answers awk gsub(): general regex Post 302619157 by CarloM on Thursday 5th of April 2012 03:48:12 AM
Old 04-05-2012
Code:
Carlo@CRM-MT4 ~
$ echo "||AAAA 1 2.; AAAA 3.|AAAA 5 6.||" |  awk '{print gensub (/([^[:blank:]]+[[:blank:]]+[[:digit:]]+[[:blank:]]+[[:digit:]]+)[^.;\|]*/,"\\1","g")}'
||AAAA 1 2.; AAAA 3.|AAAA 5 6.||

Carlo@CRM-MT4 ~
$ echo "|BBBB 7 8 f ugbi4t.; BBBB 9 10 gv3 fv3.||BBBB 11 12 rytr." |
> awk '{print gensub (/([^[:blank:]]+[[:blank:]]+[[:digit:]]+[[:blank:]]+[[:digit:]]+)[^.;\|]*/,"\\1","g")}'
|BBBB 7 8.; BBBB 9 10.||BBBB 11 12.

EDIT: Actually, since you're using | as FS the original regex should work - but the one you have in the code is not the same (and is syntactically incorrect - copy/paste error?)
Code:
$i = gensub (/({{:alnum:]]+[[:digit:]]+[[:blank:]]+[[:digit:]]+)([^.;]*)/,"\\1","g",$i)

EDIT2: It does parse (somewhat surprisingly), but it's not doing anything (nothing matches {{:alnum) - $i is unchanged.
Last edited by CarloM; 04-05-2012 at 05:03 AM..
This User Gave Thanks to CarloM For This Post:
lucasvs
 

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LEARN ABOUT V7

iswdigit

ISWDIGIT(3)						     Linux Programmer's Manual						       ISWDIGIT(3)

NAME

       iswdigit - test for decimal digit wide character

SYNOPSIS

       #include <wctype.h>

       int iswdigit(wint_t wc);

DESCRIPTION

       The  iswdigit() function is the wide-character equivalent of the isdigit(3) function.  It tests whether wc is a wide character belonging to
       the wide-character class "digit".

       The wide-character class "digit" is a subclass of the wide-character class "xdigit", and therefore also a subclass  of  the  wide-character
       class "alnum", of the wide-character class "graph" and of the wide-character class "print".

       Being a subclass of the wide character class "print", the wide-character class "digit" is disjoint from the wide-character class "cntrl".

       Being  a  subclass  of the wide-character class "graph", the wide-character class "digit" is disjoint from the wide-character class "space"
       and its subclass "blank".

       Being a subclass of the wide-character class "alnum", the wide-character class "digit" is disjoint from the wide-character class "punct".

       The wide-character class "digit" is disjoint from the wide-character class "alpha" and therefore also disjoint from its subclasses "lower",
       "upper".

       The wide-character class "digit" always contains exactly the digits '0' to '9'.

RETURN VALUE

       The  iswdigit()	function  returns  nonzero if wc is a wide character belonging to the wide-character class "digit".  Otherwise, it returns
       zero.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       +-----------+---------------+----------------+
       |Interface  | Attribute	   | Value	    |
       +-----------+---------------+----------------+
       |iswdigit() | Thread safety | MT-Safe locale |
       +-----------+---------------+----------------+
CONFORMING TO

       POSIX.1-2001, POSIX.1-2008, C99.

NOTES

       The behavior of iswdigit() depends on the LC_CTYPE category of the current locale.

SEE ALSO

       isdigit(3), iswctype(3)

COLOPHON

       This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

GNU
								    2015-08-08							       ISWDIGIT(3)
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