removing duplicate lines while maintaing coherence with second file


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# 1  
removing duplicate lines while maintaing coherence with second file

So I have two files. The first file, file1.txt, has lines of numbers separated by commas.

file1.txt
Code:
10,2,30,50
22,6,3,15,16,100
73,55
78,40,33,30,11
73,55
99,82,85
22,6,3,15,16,100

The second file, file2.txt, has sentences.

file2.txt
Code:
"the cat is fat"
"I like eggs"
"fish live in water"
"the moon is made of cheese"
"fish have houses in the water"
"the cake is a lie"
"I like my eggs scrambled"

What I would like to do is remove the duplicate lines from file1.txt, the file with the numbers, but at the same time remove the equivalent line from file2.txt.

In other words: If line 5 from file1.txt is removed because it is a duplicate, then line 5 from file2.txt should also be removed.

I know that
Code:
awk '!x[$0]++' file1.txt > file1.txt.new

will work for removing duplicates, but it does not provide coherence with file2.txt.

thanks for the help in advance

Last edited by Scott; 08-09-2011 at 03:48 PM.. Reason: Added code tags to file[12].txt
# 2  
It's not clear, exactly, what output should be given, so here goes!

Code:
$ paste -d\| file1.txt file2.txt | sort -uk1,1 | awk -F\| '{print $2}'
"the cat is fat"
"I like eggs"
"fish live in water"
"the moon is made of cheese"
"the cake is a lie"

# 3  
This should work:
Code:
awk 'NR==FNR{if(!x[$0]++)print; y[NR]=x[$0]; next}y[FNR]==1' file1.txt file2.txt

# 4  
To manipulate both files at the same time, try:
Code:
awk '{getline l<f}!x[$0]++{print l>fnew;print}' f=file2.txt fnew=file2.txt.new file1.txt > file1.txt.new


Last edited by Scrutinizer; 08-09-2011 at 05:22 PM..
This User Gave Thanks to Scrutinizer For This Post:
# 5  
Sweet, it works now. Thanks for the quick replies.
# 6  
Quote:
Originally Posted by scottn
It's not clear, exactly, what output should be given, so here goes!

Code:
$ paste -d\| file1.txt file2.txt | sort -uk1,1 | awk -F\| '{print $2}'
"the cat is fat"
"I like eggs"
"fish live in water"
"the moon is made of cheese"
"the cake is a lie"

Nice solution, but you missed an option "-t\|" in your sort.
# 7  
I agree that it's a nice solution. However, if the first file's content is as advertised (comma-delimited numbers), there's really no need to specify an alternate delimiter; the default \t suffices.

Code:
paste file1.txt file2.txt | sort -uk1,1 | cut -f2-

Regards,
Alister
This User Gave Thanks to alister For This Post:
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