inserting uniq sequential numbers at the start of the file


 
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# 1  
inserting uniq sequential numbers at the start of the file

Hi Unix gurus,
I have a file. I need to insert sequential number at the starting of the file. Fields are delimited by "|". I know the starting number.


Example:

File is as follows

|123|4test|test
|121|2test|test
|x12|1test|test
|vd123|5test|test

starting number is : 120

output must be :

120|123|4test|test
121|121|2test|test
122|x12|1test|test
123|vd123|5test|test


Advance thanks for helping.

Jingi
# 2  
awk 'BEGIN{n=120}{printf("%s%s\n",n++,$0)}' infile > outfile

Cheers
ZB
# 3  
Quote:
Originally Posted by zazzybob
awk 'BEGIN{n=120}{printf("%s%s\n",n++,$0)}' infile > outfile

Cheers
ZB

Can 120 be a varaible? I mean

variable=12

awk 'BEGIN{n=$variable}{printf("%s%s\n",n++,$0)}' infile > outfile

??

The aboe statement doesn't work if it is variable..what is the work around?
# 4  
Quote:
Originally Posted by jingi1234
Can 120 be a varaible? I mean

variable=12

awk 'BEGIN{n=$variable}{printf("%s%s\n",n++,$0)}' infile > outfile

??

The aboe statement doesn't work if it is variable..what is the work around?
Code:
nawk -v n=120 '{printf("%s%s\n",n++,$0)}' infile > outfile

# 5  
Data

What if the file has "tab" [\t] as a delimter? what should i change in the nawk?

Please help

Last edited by jingi1234; 11-17-2005 at 01:22 PM..
# 6  
Gurus,
Please help
# 7  
Quote:
Originally Posted by jingi1234
What if the file has "tab" [\t] as a delimter? what should i change in the nawk?

Please help
'man nawk' should help.
 

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