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Compare two files with repeated lines

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# 1  
Old 09-28-2014
Compare two files with repeated lines
Hi all,

I've been trying to write a script to compare two files. This is what I want:

file 1:
Code:
a 1 2
b 5 9
c 4 7

file 2:
Code:
a
a 
c
a
b

Output:
Code:
a 1 2
a 1 2
c 4 7
a 1 2
b 5 9

I have tried with awk:
Code:
awk 'NR==FNR{A[$1]=$1;next} A[$1]{$2=A[$1];print}' file2 file1

But it seems does not take into account the repeated lines, because the output I get it is the same of the file 1.

Do you know any way of doing this? Thanks in advance.
# 2  
Old 09-28-2014
Quote:
Originally Posted by ernesto561
Hi all,

I've been trying to write a script to compare two files. This is what I want:

file 1:
Code:
a 1 2
b 5 9
c 4 7

file 2:
Code:
a
a 
c
a
b

Output:
Code:
a 1 2
a 1 2
c 4 7
a 1 2
b 5 9

I have tried with awk:
Code:
awk 'NR==FNR{A[$1]=$1;next} A[$1]{$2=A[$1];print}' file2 file1

But it seems does not take into account the repeated lines, because the output I get it is the same of the file 1.

Do you know any way of doing this? Thanks in advance.
Hello ernesto561,

Following my help you in same.

Code:
awk 'FNR==NR{A[$1]=$0;next} ($1 in A){print A[$1]}' file1 file2

Thanks,
R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
ernesto561
# 3  
Old 09-28-2014
Thanks. It works perfectly. I spent some time trying to figure out the problem, now I understand that it was related to 'FNR=NR'. Thanks again.
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