removing duplicates of a pattern from a file


 
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# 1  
Old 09-04-2008
removing duplicates of a pattern from a file

hey all,

I need some help.

I have a text file with names in it.

My target is that if a particular pattern exists in that file more than once..then i want to rename all the occurences of that pattern by alternate patterns..

for e.g if i have PATTERN occuring 5 times then i want to changes the occutrences as PATTERN_1 PATTERN_2 and so on ..

jus want to identify all those deifferently .
# 2  
Old 09-04-2008
Code:
perl -pe 'BEGIN { $i = 1 } ++$i while (s/PATTERN/NONESVCH_$i/); s/NONESVCH/PATTERN/g' file

The indexing will be zero-based if you take out the BEGIN part.
# 3  
Old 09-04-2008
Hey....

Thanks a ton for the prompt response....
It works....This was jus the first part of the issue which i need to solve...will ask if any further help is needed..

Take care..

Dear All,

Please put in some alternatives if possible
# 4  
Old 09-04-2008
Quote:
Originally Posted by era
Code:
perl -pe 'BEGIN { $i = 1 } ++$i while (s/PATTERN/NONESVCH_$i/); s/NONESVCH/PATTERN/g' file

The indexing will be zero-based if you take out the BEGIN part.
the same with awk:

Code:
awk 'BEGIN {cnt=1} { while($0 ~ /PATTERN/) sub(/PATTERN/,"xxxxx"cnt++, $0); gsub(/xxxxx/,"PATTERN_",$0); print; } ' filename

 
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