Comments on: File Manipulation Examples Using Tac, Rev, Paste, and Join Unix Commands http://www.thegeekstuff.com/2009/10/file-manipulation-examples-using-tac-rev-paste-and-join-unix-commands/ Guides, HowTos and Tips for Technology Geeks Thu, 09 Feb 2012 13:04:00 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Mark D. Blackwell http://www.thegeekstuff.com/2009/10/file-manipulation-examples-using-tac-rev-paste-and-join-unix-commands/comment-page-1/#comment-169168 Mark D. Blackwell Sun, 01 Jan 2012 18:36:38 +0000 http://www.thegeekstuff.com/?p=2536#comment-169168 Using tabs as the separator with Gnu join (even though they look better) failed (at least on cygwin). I'm using: $ join --version join (GNU coreutils) 8.14 Packaged by Cygwin (8.14-1) I got this error: $ join -t "\t" -1 1 -2 2 temp emp-bonus join: multi-character tab `\\t'. Colons also are a common field separator in Unix. These commands work well: $ paste -d : emp-number emp-firstname emp-lastname > temp $ join -t : -1 1 -2 2 temp emp-bonus $ cat emp-firstname emp-number emp-lastname emp-bonus Emma Alex Madisonny Sanjay Nisha 100 200 300 400 500 Thomas Jason Randy Gupta Singh $5,000:100 $5,500:200 $6,000:300 $7,000:400 $9,500:500 $ paste -d : emp-number emp-firstname emp-lastname > temp $ cat temp 100:Emma:Thomas 200:Alex:Jason 300:Madisonny:Randy 400:Sanjay:Gupta 500:Nisha:Singh $ join -t : -1 1 -2 2 temp emp-bonus 100:Emma:Thomas:$5,000 200:Alex:Jason:$5,500 300:Madison:Randy:$6,000 400:Sanjay:Gupta:$7,000 500:Nisha:Singh:$9,500 To tab-space the output (though long fields look bad): $ join -t : -1 1 -2 2 temp emp-bonus | tr : "\t" 100 Emma Thomas $5,000 200 Alex Jason $5,500 300 Madisonny Randy $6,000 400 Sanjay Gupta $7,000 500 Nisha Singh $9,500 Using tabs as the separator with Gnu join (even though they look better) failed (at least on cygwin). I’m using:
$ join –version
join (GNU coreutils) 8.14
Packaged by Cygwin (8.14-1)

I got this error:
$ join -t “\t” -1 1 -2 2 temp emp-bonus
join: multi-character tab `\\t’.

Colons also are a common field separator in Unix. These commands work well:
$ paste -d : emp-number emp-firstname emp-lastname > temp
$ join -t : -1 1 -2 2 temp emp-bonus

$ cat emp-firstname emp-number emp-lastname emp-bonus
Emma
Alex
Madisonny
Sanjay
Nisha
100
200
300
400
500
Thomas
Jason
Randy
Gupta
Singh
$5,000:100
$5,500:200
$6,000:300
$7,000:400
$9,500:500

$ paste -d : emp-number emp-firstname emp-lastname > temp
$ cat temp
100:Emma:Thomas
200:Alex:Jason
300:Madisonny:Randy
400:Sanjay:Gupta
500:Nisha:Singh

$ join -t : -1 1 -2 2 temp emp-bonus
100:Emma:Thomas:$5,000
200:Alex:Jason:$5,500
300:Madison:Randy:$6,000
400:Sanjay:Gupta:$7,000
500:Nisha:Singh:$9,500

To tab-space the output (though long fields look bad):
$ join -t : -1 1 -2 2 temp emp-bonus | tr : “\t”
100 Emma Thomas $5,000
200 Alex Jason $5,500
300 Madisonny Randy $6,000
400 Sanjay Gupta $7,000
500 Nisha Singh $9,500

]]> By: argv http://www.thegeekstuff.com/2009/10/file-manipulation-examples-using-tac-rev-paste-and-join-unix-commands/comment-page-1/#comment-77953 argv Sat, 08 Jan 2011 04:14:17 +0000 http://www.thegeekstuff.com/?p=2536#comment-77953 isn't it possible to emulate the basic function of paste with the shell, using nested for loops and printf? is paste another one of unix's many redundant utilities? is paste(1) redundant? (at least partially) here's an example of what i mean: http://pastebin.com/4grdppt9 isn’t it possible to emulate the basic function of paste with the shell, using nested for loops and printf?

is paste another one of unix’s many redundant utilities?

is paste(1) redundant? (at least partially)
here’s an example of what i mean:
http://pastebin.com/4grdppt9

]]> By: litd http://www.thegeekstuff.com/2009/10/file-manipulation-examples-using-tac-rev-paste-and-join-unix-commands/comment-page-1/#comment-73206 litd Tue, 14 Dec 2010 19:28:04 +0000 http://www.thegeekstuff.com/?p=2536#comment-73206 Hi Jim, Thanks for the tip. However, would you please use the sample above to show the result file using tr? Thanks! Hi Jim,

Thanks for the tip. However, would you please use the sample above to show the result file using tr?

Thanks!

]]> By: Jim http://www.thegeekstuff.com/2009/10/file-manipulation-examples-using-tac-rev-paste-and-join-unix-commands/comment-page-1/#comment-72844 Jim Sun, 12 Dec 2010 06:27:57 +0000 http://www.thegeekstuff.com/?p=2536#comment-72844 to use tabs as delimiters instead of commas change the -t parameter. if you want to change the commas to tabs then use tr to use tabs as delimiters instead of commas change the -t parameter.

if you want to change the commas to tabs then use tr

]]> By: litd http://www.thegeekstuff.com/2009/10/file-manipulation-examples-using-tac-rev-paste-and-join-unix-commands/comment-page-1/#comment-39404 litd Mon, 15 Mar 2010 16:15:33 +0000 http://www.thegeekstuff.com/?p=2536#comment-39404 Hi, I have a question about join. how could the output file use tab instead of space as separator in the above sample? Thanks! Hi,

I have a question about join.

how could the output file use tab instead of space as separator in the above sample?

Thanks!

]]> By: JJ http://www.thegeekstuff.com/2009/10/file-manipulation-examples-using-tac-rev-paste-and-join-unix-commands/comment-page-1/#comment-19901 JJ Tue, 20 Oct 2009 10:33:22 +0000 http://www.thegeekstuff.com/?p=2536#comment-19901 tac command is a new one for me ... Thanks!! tac command is a new one for me … Thanks!!

]]> By: Danaville » Blog Archive » unix http://www.thegeekstuff.com/2009/10/file-manipulation-examples-using-tac-rev-paste-and-join-unix-commands/comment-page-1/#comment-19837 Danaville » Blog Archive » unix Mon, 19 Oct 2009 17:07:19 +0000 http://www.thegeekstuff.com/?p=2536#comment-19837 [...] File Manipulation Examples Using Tac, Rev, Paste, and Join unix . In this article, let us review how to use unix tac command, rev command, paste command, and join command with practical examples. 1. tac command – Print. [...] [...] File Manipulation Examples Using Tac, Rev, Paste, and Join unix . In this article, let us review how to use unix tac command, rev command, paste command, and join command with practical examples. 1. tac command – Print. [...]

]]> By: Mauricio http://www.thegeekstuff.com/2009/10/file-manipulation-examples-using-tac-rev-paste-and-join-unix-commands/comment-page-1/#comment-19827 Mauricio Mon, 19 Oct 2009 12:58:53 +0000 http://www.thegeekstuff.com/?p=2536#comment-19827 Excelente página Translation: Spanish » English Excellent page Excelente página

Translation: Spanish » English

Excellent page

]]> By: louic http://www.thegeekstuff.com/2009/10/file-manipulation-examples-using-tac-rev-paste-and-join-unix-commands/comment-page-1/#comment-19814 louic Mon, 19 Oct 2009 09:53:36 +0000 http://www.thegeekstuff.com/?p=2536#comment-19814 I did not know about the paste command, but it will be very useful for me. Thanks again, for the clear and to-the-point examples! I did not know about the paste command, but it will be very useful for me. Thanks again, for the clear and to-the-point examples!

]]>