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Top Forums Shell Programming and Scripting Join Post 302320659 by devtakh on Thursday 28th of May 2009 01:42:44 PM
Old 05-28-2009
I will let you shorten this -

Code:
gawk -F "|" 'FILENAME=="1.txt"{!a[$1]++;next}
                FILENAME=="2.txt"{if($1 in b)next  
                     else b[$1]=$2"|"$3;next}  
            FILENAME=="3.txt"{if($1 in d)next 
               else d[$1]=$2"|"$3;next}     
    END{for(i in a)print i,b[i],d[i]}' OFS="|" 1.txt 2.txt 3.txt


-Devaraj Takhellambam
 

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LEARN ABOUT CENTOS

info

INFO(1) 							   User Commands							   INFO(1)

NAME

       info - read Info documents

SYNOPSIS

       info [OPTION]... [MENU-ITEM...]

DESCRIPTION

       Read documentation in Info format.

OPTIONS

       -k, --apropos=STRING
	      look up STRING in all indices of all manuals.

       -d, --directory=DIR
	      add DIR to INFOPATH.

       --dribble=FILENAME
	      remember user keystrokes in FILENAME.

       -f, --file=FILENAME
	      specify Info file to visit.

       -h, --help
	      display this help and exit.

       --index-search=STRING
	      go to node pointed by index entry STRING.

       -n, --node=NODENAME
	      specify nodes in first visited Info file.

       -o, --output=FILENAME
	      output selected nodes to FILENAME.

       -R, --raw-escapes
	      output "raw" ANSI escapes (default).

       --no-raw-escapes
	      output escapes as literal text.

       --restore=FILENAME
	      read initial keystrokes from FILENAME.

       -O, --show-options, --usage
	      go to command-line options node.

       --strict-node-location
	      (for debugging) use Info file pointers as-is.

       --subnodes
	      recursively output menu items.

       --vi-keys
	      use vi-like and less-like key bindings.

       --version
	      display version information and exit.

       -w, --where, --location
	      print physical location of Info file.

       The first non-option argument, if present, is the menu entry to start from; it is searched for in all `dir' files along INFOPATH.  If it is
       not present, info merges all `dir' files and shows the result.  Any remaining arguments are treated as the names of menu items relative	to
       the initial node visited.

       For a summary of key bindings, type h within Info.

EXAMPLES

       info   show top-level dir menu

       info info
	      show the general manual for Info readers

       info info-stnd
	      show the manual specific to this Info program

       info emacs
	      start at emacs node from top-level dir

       info emacs buffers
	      start at buffers node within emacs manual

       info --show-options emacs
	      start at node with emacs' command line options

       info --subnodes -o out.txt emacs
	      dump entire manual to out.txt

       info -f ./foo.info
	      show file ./foo.info, not searching dir

REPORTING BUGS

       Email bug reports to bug-texinfo@gnu.org, general questions and discussion to help-texinfo@gnu.org.
       Texinfo home page: http://www.gnu.org/software/texinfo/

COPYRIGHT

       Copyright (C) 2013 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The full documentation for info is maintained as a Texinfo manual.  If the info program is properly installed at your site, the command

	      info info

       should give you access to the complete manual.  (Or, if you have Emacs, M-x info will lead to the manual.)

info 5.1							     June 2014								   INFO(1)
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