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Replacing nth occurence


 
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Top Forums Shell Programming and Scripting Replacing nth occurence
# 8  
Old 10-29-2009
Could you give an example?
# 9  
Old 10-29-2009
eg:

val1 | val2 | val1 | val2 | val1 | val2 | val1 | val2

here i need to replace '|' with '|\n' where the occurence of '|' is divisble by 2
# 10  
Old 10-29-2009
I still don't understand what exactly you want to match.
If Perl is acceptable:

Code:
% print 'val1 | val2 | val1 | val2 | val1 | val2 | val1 | val2' |
  perl -pe's/(\| )/$c++%2?"$1\n":$1/ge'
val1 | val2 | 
val1 | val2 | 
val1 | val2 | 
val1 | val2

# 11  
Old 10-29-2009
S that was the requirment

But now in my real use it is after every 25th occurence of '|' in a line i need to place a '\n'

For eg
i have 75 occurence of '|' in a line, so i have to replace the 25th,50th and 75th occurence of '|' with '|\n'

when i used perl -pe's/(\| )/$c++%25?"$1\n":$1/ge'
it did not work

Last edited by raghav288; 10-29-2009 at 11:48 AM..
# 12  
Old 10-29-2009
Code:
perl -pe's/(\| )/++$c%25?$1:"$1\n"/ge'


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