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Full Discussion: Deleting double quoted string from a line when line number is variable
Top Forums Shell Programming and Scripting Deleting double quoted string from a line when line number is variable Post 302832035 by rennatsb on Friday 12th of July 2013 02:30:30 PM
Old 07-12-2013
Deleting double quoted string from a line when line number is variable
I need to remove double quoted strings from specific lines in a file. The specific line numbers are a variable. For example, line 5 of the file contains

A B C "string"

I want to remove "string". The following sed command works:

Code:
sed '5 s/\"[a-zA-Z0-9]*\"//' $file

If there are multiple lines in the file that need to edited and the line number is a variable, i.e. $lineno, the following does not work:

Code:
sed '$lineno s/\"[a-zA-Z0-9]*\"//' $file

I believe the sed command must be double quoted for the variable to be evaluated, so I tried that and I get the error - Unmatched ".

Code:
sed "$lineno s/\"[a-zA-Z0-9]*\"//" $file

Last edited by Scrutinizer; 07-12-2013 at 09:27 PM.. Reason: code tags
 

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LEARN ABOUT MOJAVE

ppi::token::quote::double

PPI::Token::Quote::Double(3)				User Contributed Perl Documentation			      PPI::Token::Quote::Double(3)

NAME

       PPI::Token::Quote::Double - A standard "double quote" token

INHERITANCE

	 PPI::Token::Quote::Double
	 isa PPI::Token::Quote
	     isa PPI::Token
		 isa PPI::Element

DESCRIPTION

       A "PPI::Token::Quote::Double" object represents a double-quoted interpolating string.

       The string is treated as a single entity, PPI will not try to understand what is in the string during the parsing process.

METHODS

       There are several methods available for "PPI::Token::Quote::Double", beyond those provided by the parent PPI::Token::Quote, PPI::Token and
       PPI::Element classes.

       Got any ideas for methods? Submit a report to rt.cpan.org!

   interpolations
       The interpolations method checks to see if the double quote actually contains any interpolated variables.

       Returns true if the string contains interpolations, or false if not.

   simplify
       For various reasons, some people find themselves compelled to have their code in the simplest form possible.

       The "simply" method will turn a simple double-quoted string into the equivalent single-quoted string.

       If the double can be simplified, it will be modified in place and returned as a convenience, or returns false if the string cannot be
       simplified.

SUPPORT

       See the support section in the main module.

AUTHOR

       Adam Kennedy <adamk@cpan.org>

COPYRIGHT

       Copyright 2001 - 2011 Adam Kennedy.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       The full text of the license can be found in the LICENSE file included with this module.

perl v5.18.2							    2011-02-25					      PPI::Token::Quote::Double(3)
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