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Full Discussion: Awk to find space and tab.
Top Forums Shell Programming and Scripting Awk to find space and tab. Post 302321625 by pinnacle on Monday 1st of June 2009 06:18:38 PM
Old 06-01-2009
Quote:
Originally Posted by reborg
Change the * to +. You have made the extremely common mistake of using an REGEX with a zero length match.
Code:
 nawk -F"|" '{for(i=1;i<=NF;i++) {if ($i ~ "^[ \t]+" || $i ~ "[ \t]+$")}}1' file

still the same thing.
And i want to look 2,3 and 5th field only not all the fields
 

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LESSECHO(1)						      General Commands Manual						       LESSECHO(1)

NAME
lessecho - expand metacharacters SYNOPSIS
lessecho [-ox] [-cx] [-pn] [-dn] [-mx] [-nn] [-ex] [-a] file ... DESCRIPTION
lessecho is a program that simply echos its arguments on standard output. But any metacharacter in the output is preceded by an "escape" character, which by default is a backslash. OPTIONS
A summary of options is included below. -ex Specifies "x", rather than backslash, to be the escape char for metachars. If x is "-", no escape char is used and arguments con- taining metachars are surrounded by quotes instead. -ox Specifies "x", rather than double-quote, to be the open quote character, which is used if the -e- option is specified. -cx Specifies "x" to be the close quote character. -pn Specifies "n" to be the open quote character, as an integer. -dn Specifies "n" to be the close quote character, as an integer. -mx Specifies "x" to be a metachar. By default, no characters are considered metachars. -nn Specifies "n" to be a metachar, as an integer. -fn Specifies "n" to be the escape char for metachars, as an integer. -a Specifies that all arguments are to be quoted. The default is that only arguments containing metacharacters are quoted SEE ALSO
less(1) AUTHOR
This manual page was written by Thomas Schoepf <schoepf@debian.org>, for the Debian GNU/Linux system (but may be used by others). Send bug reports or comments to bug-less@gnu.org. Version 487: 25 Oct 2016 LESSECHO(1)
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