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Get row number from file1 and print that row of file2

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# 1  
Old 02-27-2014
Get row number from file1 and print that row of file2
Hi.
How can we print those rows of file2 which are mentioned in file1. first character of file1 is a row number.. for eg

file1
Code:
1:abc          
3:ghi          
6:pqr

file2
Code:
a abc
b def
c ghi
d jkl
e mno
f pqr


output should contain

Code:
1: a abc
3: c ghi
6: f pqr

Please help me with this case. i believe it can be done using awk
Last edited by bartus11; 02-27-2014 at 02:25 PM.. Reason: Please use [code][/code] tags.
# 2  
Old 02-27-2014
Try:
Code:
awk -F"[ :]" 'NR==FNR{a[$2]=1;next}$2 in a{print a[$2]": "$0}' file1 file2

# 3  
Old 02-27-2014
Approach with join if the original file has the same format. This omits the : though.

Code:
sed 's/:/ /' file2 | join -1 2 -2 2 -o 1.1,2.1,2.2 - file2

--ahamed
# 4  
Old 02-27-2014
but this limits to this fine only.. i want to read from a file and then do operations in another file

---------- Post updated at 02:06 PM ---------- Previous update was at 02:05 PM ----------

@bartus11
i get following output with your code

1: a
1: b
1: c
1: d
1: e
1: f
1: g
1: h
1:
# 5  
Old 02-27-2014
You mean you have one file as reference file1 and then based on the data in file1 you need to do the operations on other multiple files?

--ahamed
# 6  
Old 02-27-2014
i have many pairs of file1 and file2 each containing different values.. i want a solution so that based on values in file1 i get corresponding rows in file2
# 7  
Old 02-27-2014
Try this...

Code:
awk -F'[: ]' 'NR==FNR{a[$2]=$1;next} $2 in a{ print a[$2]":" $0 }' file1 file2

And identify the pair of files and pass it to this command thru some loop.

--ahamed

---------- Post updated at 11:15 AM ---------- Previous update was at 11:13 AM ----------

Which is your OS? If solaris use nawk.
bartus11 code works for me with a minor modification, he missed a $ by mistake. Infact, my code is same as his.

Code:
awk -F"[ :]" 'NR==FNR{a[$2]=$1;next}$2 in a{print a[$2]": "$0}' file1 file2

--ahamed
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