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Inserting string in between field in comma separated file

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# 1  
Old 01-06-2012
Inserting string in between field in comma separated file
Hello Mates,

I have one txt file having commo seperated values. I have to insert string "FALSE" in 2nd field from the end. E.G

Code:
SE18 6RN,,,,5439070,1786840,,1000002148671600,123434

Out put should be:

Code:
SE18 6RN,,,,5439070,1786840,FALSE,1000002148671600,123434

Can some one help me to do?

Thanks
Last edited by zxmaus; 01-07-2012 at 07:01 AM.. Reason: added tags
# 2  
Old 01-06-2012
Code:
$ nawk -F, 'BEGIN{OFS=","}{$(NF-2)="FALSE";print}' input.txt
SE18 6RN,,,,5439070,1786840,FALSE,1000002148671600,123434

# 3  
Old 01-06-2012
Code:
perl -F, -ane '($F[-3] eq "")&&($F[-3]="FALSE");print join(",",@F)' inputfile

# 4  
Old 01-06-2012
Code:
printf ",s/[^,]*,/FALSE,/7\nw\nq\n" | ed -s yourfile

# 5  
Old 01-07-2012
Inserting string in between field in commo separated file
Thanks a lot all,

Hi itkamaraj , balajesuri,

As I am very expert I just want to know that can you please give brief how your soultion works i.e Exactly how this works:
Code:
1. nawk -F, 'BEGIN{OFS=","}{$(NF-2)="FALSE";print}'
2. perl -F, -ane '($F[-3] eq "")&&($F[-3]="FALSE");print join(",",@F)' inputfile

Note: I am using HP unix 11.1 not linux.

Many thanks
Krsnadasa

---------- Post updated at 02:20 AM ---------- Previous update was at 02:19 AM ----------

Sorry Mates I mean to say I am not very expert in Unix..

Smilie

Moderator's Comments:
Mod Comment Please use
code tags!


---------- Post updated at 05:19 AM ---------- Previous update was at 02:20 AM ----------

Thanks a lot all,

Hi itkamaraj , balajesuri,

As I am not very expert I just want to know that can you please give brief how your soultion works i.e Exactly how this works:


Code:
1. nawk -F, 'BEGIN{OFS=","}{$(NF-2)="FALSE";print}'2. perl -F, -ane '($F[-3] eq "")&&($F[-3]="FALSE");print join(",",@F)' inputfile

Note: I am using HP unix 11.1 not linux.
Last edited by vbe; 01-07-2012 at 06:07 AM.. Reason: code tags
# 6  
Old 01-07-2012
Code:
 nawk -F, '{$(NF-2)="FALSE"; print}' OFS=, input.txt

-F,     => Indicating the field separator is , (comma)
NF      => The total no of fields
NF-2    => Second last field
$(NF-2) => The value of second last field. $(NF-2)="FALSE" means assign "FALSE" to the second last field
OFS=,   => Assign output field separator ,(comma).
print   => Print

HTH
--ahamed
# 7  
Old 01-10-2012
Many thanks Ahamed,

Your soultion is wokring fine. Sorry for delay in reply.

Hi itkamaraj ,

Your perl is not doing anything atcually.

Thanks
Krsnadasa
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