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Top Forums Shell Programming and Scripting Delete blank lines, if blank lines are more than one using shell Post 302521065 by anil8103 on Tuesday 10th of May 2011 06:36:42 AM
Old 05-10-2011
Delete blank lines, if blank lines are more than one using shell

Hi,
Consider a file named "testfile"
The contents of file are as below
Code:
first line added for test

second line added for test


third line added for test

fourth line added for test




fifth line added for test

I need the output as below
Code:
first line added for test

second line added for test

third line added for test

fourth line added for test

fifth line added for test

Pls help me to get the desired output.

To be simple : I want to delete blank lines,if blank lines are more than one.

Thanks in advance

Anil.G

Moderator's Comments:
Mod Comment Please use [code] and [/code] tags when posting code, data or logs etc. to preserve formatting and enhance readability, thanks.

Last edited by zaxxon; 05-10-2011 at 07:42 AM.. Reason: code tags
 

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wibble-test-genrunner(1)				      General Commands Manual					  wibble-test-genrunner(1)

NAME
wibble-test-genrunner - Code generator for wibble testsuites. SYNOPSIS
wibble-test-genrunner header <file> wibble-test-genrunner main <files> DESCRIPTION
The program generates .cpp files that are then compiled and linked into a test program for running tests from .test.h files. Examples of such .test.h files may be found among wibble headers, eg. /usr/include/wibble/regexp.test.h. In the first form, the program processes a single header file (usually of the form foo.test.h) and produces a corresponding .cpp file to be compiled. In the second form, it takes as <files> all the .test.h headers and produces a single main.cpp which contains the main() function of the test program, which then runs all the tests in all the .test.h files. The generated source code is always written to standard output and it is left up to the user to redirect it to a meaningful location. The program currently has no options other than the two forms above. The program is intended to be run as part of build process of programs or libraries using the wibble testing framework. For convenient use from CMake, there is a test.cmake script under /usr/share/wibble, that takes care of producing all the .cpp files (both per-header and the main one), compiling them and linking them into a single binary which executes the testsuite. AUTHOR
Petr Rockai <me@mornfall.net> wibble-test-genrunner(1)
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