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Full Discussion: Function to add escape character before specified character
Top Forums Shell Programming and Scripting Function to add escape character before specified character Post 302881597 by RudiC on Monday 30th of December 2013 12:33:10 PM
Old 12-30-2013
Try also
Code:
awk -v X="& ;" -v E='\' '{gsub(/./,"&|",X); sub (/.$/,"", X); gsub (X, "\\" E "&")}1' <<< 'abcd fkaj&dsdsd'
abcd\ fkaj\&dsdsd

If you know the escape char is back slash, this may work:
Code:
awk -v X="& ;" -v E='\' '{gsub(/./,"&|",X); sub (/.$/,"", X); gsub (X, E E "&")}1' <<< 'abcd fkaj&dsdsd'
abcd\ fkaj\&dsdsd

Yoda's approach misses the space special char as that is used as a separator by the split function.

EDIT: Even simpler:
Code:
awk -v X="& ;" -v E='\' '{ gsub ("["X"]", E E "&")}1' <<< 'abcd fkaj&dsdsd'
abcd\ fkaj\&dsdsd

Last edited by RudiC; 12-30-2013 at 01:40 PM..
This User Gave Thanks to RudiC For This Post:
Anupam_Halder
 

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LEARN ABOUT DEBIAN

yri

YRI(1)																	    YRI(1)

NAME

       yri - documentation tool in console for Ruby

SYNOPSIS

       yri [options] Path_to_object

DESCRIPTION

       yard(1) is an extensible documentation generation tool for the Ruby programming language. It enables the user to generate consistent,
       usable documentation that can be exported to a number of formats very easily, and also supports extending for custom Ruby constructs such
       as custom class level definitions.

       yri(1), synonym for yard ri gives the possibility to read the documentation for Ruby programs inside a console, pretty much like ri(1).

OPTIONS

   General Options:
       -b, --db FILE
	   Use a specified .yardoc db to search in

       -T, --no-pager
	   No pager

       -p, --pager PAGER
	   Use PAGER as a pager

   Other options:
       -e, --load FILE
	   A Ruby script to load before running command.

       --plugin PLUGIN
	   Load a YARD plugin (gem with `yard-' prefix)

       --legacy
	   Use old style Ruby parser and handlers. Always on in 1.8.x.

       --safe
	   Enable safe mode for this instance

       -q, --quiet
	   Show no warnings.

       --verbose
	   Show more information.

       --debug
	   Show debugging information.

       --backtrace
	   Show stack traces

       -v, --version
	   Show version.

       -h, --help
	   Show a help message, similar to this page.

EXAMPLES

       yri String#gsub

SEE ALSO

       yard(1).

AUTHORS

       yard has been developed by Loren Segal <lsegal@soen.ca>.

       This manual page has been written for the Debian Project by CA(C)dric Boutillier (but may used by others).

								    2012-05-08								    YRI(1)
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