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Perl search and append new line

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# 1  
Old 04-18-2011
Perl search and append new line
Dear All,

I want search two lines and append some string in between these lines.

Input file
Code:
tmp,123
,10:123
tmp,666
,50:999
tmp,2:19800
5,3:21.
tmp,2:19800
55555555
tmp,2:19800
5,3:21.

Output should be
Code:
tmp,123
,10:123
tmp,666
,50:999
tmp,2:19800
appending 980000
5,3:21.
tmp,2:19800
55555555
tmp,2:19800
appending 980000
5,3:21.

was trying with following code but not working.
Code:
perl -p0e 's/(,2:19800\n5,3:)1/${1}\nappending 980000/g' input.txt


Thanks in advance
Last edited by radoulov; 04-18-2011 at 12:26 PM.. Reason: Code tags, please!
# 2  
Old 04-18-2011
Try:
Code:
perl -p0e 's/(?<=tmp,2:19800\n)(?=5,3:21.)/appending 980000\n/' input.txt

# 3  
Old 04-19-2011
Thank you very much J could you please explain how it works.
# 4  
Old 04-19-2011
This regular expression uses look-behind and look-ahead to match position in the file between tmp,2:19800 and 5,3:21. Substitution string is then inserted in there.
# 5  
Old 05-19-2011
Need to search in 4 lines and replace with changes in one line and append new line

Search this pattern :

3,71:16/GGGG**111***S***
13,10:51
,487:5/G_CGI
14,9:6/400000


Replace with :

3,71:16/GGGG**111***S***
13,9:6/400000
,10:51
,487:5/G_CGI
14,9:6/400000
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