Selecteing only non commented rows Post: 302241990

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Top Forums UNIX for Dummies Questions & Answers Selecteing only non commented rows Post 302241990 by hiptoss on Wednesday 1st of October 2008 01:39:37 AM

10-01-2008

Registered User

The simplest way would to add a simple grep that ignores lines starting with #... like so

cat $Parmdir/jobname.lst | grep -v ^# | while read line

The "^" character, in case you're not familiar, specifies the beginning of a line. So if we group that with the -v (invert matching, aka do not print matching lines) it states do not print any lines that begin with the hash mark. (#)

Enjoy!

Quote:

Originally Posted by Amey Joshi

Hi,

I have develop a script that will read a single line from file and do some operations.But now my problwm is that if in that file suppose 1 line is commented, then i have to ignore that line...Can anybody help me out to solve this issue? Smilie

Details are:

Script:

HTML Code:

#!/bin/sh
Parmdir=/opt/home/xyz
cat $Parmdir/jobname.lst | while read line
do
some command
done

cat jobname.lst

HTML Code:

ABCD
EFGH
#AFFF
RRRRR

So in the above script i have to ignore the 3rd line. Smilie

Please help me. Smilie

Thanks In Advance!

hiptoss

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git-stripspace

GIT-STRIPSPACE(1)						    Git Manual							 GIT-STRIPSPACE(1)

NAME

       git-stripspace - Remove unnecessary whitespace

SYNOPSIS

       git stripspace [-s | --strip-comments]
       git stripspace [-c | --comment-lines]

DESCRIPTION

       Read text, such as commit messages, notes, tags and branch descriptions, from the standard input and clean it in the manner used by Git.

       With no arguments, this will:

       o   remove trailing whitespace from all lines

       o   collapse multiple consecutive empty lines into one empty line

       o   remove empty lines from the beginning and end of the input

       o   add a missing 
 to the last line if necessary.

       In the case where the input consists entirely of whitespace characters, no output will be produced.

       NOTE: This is intended for cleaning metadata, prefer the --whitespace=fix mode of git-apply(1) for correcting whitespace of patches or
       files in the repository.

OPTIONS

       -s, --strip-comments
	   Skip and remove all lines starting with comment character (default #).

       -c, --comment-lines
	   Prepend comment character and blank to each line. Lines will automatically be terminated with a newline. On empty lines, only the
	   comment character will be prepended.

EXAMPLES

       Given the following noisy input with $ indicating the end of a line:

	   |A brief introduction   $
	   |   $
	   |$
	   |A new paragraph$
	   |# with a commented-out line    $
	   |explaining lots of stuff.$
	   |$
	   |# An old paragraph, also commented-out. $
	   |	  $
	   |The end.$
	   |  $

       Use git stripspace with no arguments to obtain:

	   |A brief introduction$
	   |$
	   |A new paragraph$
	   |# with a commented-out line$
	   |explaining lots of stuff.$
	   |$
	   |# An old paragraph, also commented-out.$
	   |$
	   |The end.$

       Use git stripspace --strip-comments to obtain:

	   |A brief introduction$
	   |$
	   |A new paragraph$
	   |explaining lots of stuff.$
	   |$
	   |The end.$

GIT

       Part of the git(1) suite

Git 2.17.1							    10/05/2018							 GIT-STRIPSPACE(1)