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Full Discussion: Keep the last instance of the record
Top Forums Shell Programming and Scripting Keep the last instance of the record Post 302365630 by Scrutinizer on Tuesday 27th of October 2009 04:02:09 PM
Old 10-27-2009
Code:
$ awk -F '|' '{A[$1]=$2}END{for (i in A) print i"|"A[i]}' infile
1| abcde
2| abcd
3| abcde

This is using your example infile. If the last record would be 2 |abcde then the output is:
Code:
1| abcde
2| abcde

The input does not need to be sorted.
Last edited by Scrutinizer; 10-27-2009 at 05:08 PM..
 

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LEARN ABOUT DEBIAN

dr_cdrip

DR_CDRIP(1)							       Draai							       DR_CDRIP(1)

NAME

       dr_cdrip - rip audio cd's to ogg

SYNOPSIS

       dr_cdrip [args] < id3-tag-file

DESCIPTION

       dr_cdrip sets up a cdparanoia(1) - oggenc(1) pipe for each track on your audio cd, so that the audio on your cd will be stored as .ogg
       files on your harddisk. args will get passed to each songs' oggenc(1) invocation.

       id3-tag-file could look like this:

	Jaffa - Star 67
	Think of one - Den Antwaarpse Shabi
	Klute - Angry Woman
	Electrotwist - The Smurfer

       Evil characters are discarded from the file, we don't want them to appear in filenames. If a line lacks a ' - ', the line is assumed to be
       a title.

       Defauls setting of oggenc(1)'s --quality level is 7, override by setting the CDRIP_QUALITY environment variable.

       Note: mp3's id3 tags seem to be called "comments" in the .ogg world.

EXAMPLE

	dj@gelfand ~$ export CDRIP_QUALITY=9
	dj@gelfand /h.../The_New_York_Contemporary_Five$ dr_cdrip 
	 -l "The New York Contemporary Five" -a "Archie Shepp" 
	 -c "description=Don Cherry: crnt, Archie Shepp: ts, Don 
	 Moore: b, JC Moses:d" -c "genre=Jazz" -c "date=1963" 
	 -c "location=Copenhagen" 
	 -c "copyright=1991 Storyville Records" -c "license=All Rights Reserved" 
	 -c "organization=Storyville" 
	 -c "contact=http://www.storyville-records.com/" 
	 -c "diskid=bd10c70d" < /tmp/songlist

       See DISCID HOWTO on http://freedb.org/modules.php?name=Sections&sop=viewarticle&artid=6 for info on disk id.  Beware!  A diskid comment is
       _not_ mentioned in the xiph.org suggestions!

       (oggenc's -t will be used by dr_cdrip. -a might be.)

       supported extra comments are (see ogg123.c)

	VERSION=, TRACKNUMBER=, ISRC=

       ARTIST is -a, ALBUM is -l TITLE is -t.

       VERSION is e.g. 'Biosphere Foo Mix'.  Multipe ARTIST tags can occur; this use is encouraged if applicable.  -c foo will be displayed by
       ogg123 as 'Comment: foo'.

       Run something like:

	cdcd tracks | sed 's/^.*] *//' | sed 's/ $//'

       to extract a songlist from a cddb database.

BUGS

       The format of the songinfo input file is non-standard.  Support for cddb is lacking.

SEE ALSO

       http://xiph.org/ogg/vorbis/doc/v-comment.html

       abcde - A Better CD Encoder at http://www.hispalinux.es/~data/abcde.php

VERSION, SOURCE
       This file is maintained at http://git.mdcc.cx/draai

HISTORY

       First version written 2001-01-09.  Last maintenance, as of 2007-08-22, done at 2005-12-14.

COPYRIGHT

       Copyright: AX 2001-2005 Joost van Baal

       This program is in the public domain.

AUTHOR

       Joost van Baal <spamhere@mdcc.cx>

draai 20100511							    2009-12-16							       DR_CDRIP(1)
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