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Full Discussion: Merge input from two files into one based on conditions
Top Forums Shell Programming and Scripting Merge input from two files into one based on conditions Post 302944590 by Zooma on Wednesday 20th of May 2015 12:46:05 PM
Old 05-20-2015
Merge input from two files into one based on conditions
Using Linux (bash), I have two files which contain information about berries. Example:

file1.txt:
Code:
Blueberry blue 14
Raspberry red 12
Blackberry dark 4

file2.txt
Code:
Blackberry sour 4 3
Blueberry tasty 12 78
Strawberry yummy 33 88

I want to merge these two files into one. The desired result from the above would be:
Code:
Blueberry blue 14 tasty 12 78
Raspberry red 12 - - -
Blackberry dark 4 sour 4 3
Strawberry - - yummy 33 88

So the three columns of file1.txt and the four columns of file2.txt should result in a new file with six columns where all berries present in these two files only are represented with one row each. If a berry is not present in one of the two files, the corresponding entries from that file are replaced with a dash (like for Strawberry and Raspberry above).

This command is getting me somewhere close:
Code:
awk 'FNR==NR{a[$1]=$2 FS $3 FS $4;next}{ print $0, a[$1]}' file2.txt file1.txt

Result:
Code:
Blueberry blue 14 tasty 12 78
Raspberry red 12
Blackberry dark 4 sour 4 3

Only prints the berries that are present in file1.txt though and it doesn't add the dashes. Can someone help?

Thanks!
/Z
 

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LEARN ABOUT DEBIAN

xclip-copyfile

XCLIP-COPYFILE(1)					      General Commands Manual						 XCLIP-COPYFILE(1)

NAME

       xclip-copyfile, xclip-cutfile, xclip-pastefile - copy and move files via the X clipboard

SYNOPSIS

       xclip-copyfile [-p] FILES...

       xclip-cutfile [-p] FILES...

       xclip-pastefile

DESCRIPTION

       xclip-copyfile copies files into the X clipboard, recursing into directories.

       xclip-cutfile copies the files, but also deletes them afterwards.

       -p     preserve path formation

       xclip-pastefile pastes the files out of the clipboard

EXAMPLES

       Copying a file to a remote host

       [maggie.lkpg.cendio.se ~]$ echo "A file created on ${HOSTNAME}" > file1
       [maggie.lkpg.cendio.se ~]$ xclip-copyfile file1
       [sofie.homeip.net ~/doc]$ xclip-pastefile
       file1
       [sofie.homeip.net ~/doc]$ cat file1
       A file created on maggie.lkpg.cendio.se

       Copying an entire tree structure

       [sofie.homeip.net ~]$ xclip-copyfile doc
       [maggie.lkpg.cendio.se ~/tmp]$ xclip-pastefile
       doc/
       doc/letter-mom-april.txt
       doc/file1
       doc/letter-dad-march.txt

       Copying files with preserved path information

       [maggie.lkpg.cendio.se ~]$ xclip-copyfile -p /etc/sysconfig/grub
       tar: Removing leading `/' from member names
       [sofie.homeip.net ~/tmp]$ xclip-pastefile
       etc/sysconfig/grub
       [sofie.homeip.net ~/tmp]$ ls etc/sysconfig/grub
       etc/sysconfig/grub

       Moving files

       [sofie.homeip.net ~]$ ls letter-brother-may.txt
       letter-brother-may.txt
       [sofie.homeip.net ~]$ xclip-cutfile letter-brother-may.txt
       [sofie.homeip.net ~]$ ls letter-brother-may.txt
       ls: cannot access letter-brother-may.txt: No such file or directory
       [sofie.homeip.net ~]$ cd doc
       [sofie.homeip.net ~/doc]$ xclip-pastefile
       letter-brother-may.txt

AUTHORS

       This  manual  page  was written by Maximilian Gass <mxey@cloudconnected.org> for the Debian project. It may be used for everything else, of
       course.

																 XCLIP-COPYFILE(1)
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