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find and replace variable

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# 1  
Old 08-08-2007
find and replace variable

Is there an easy way of doing this

cat file1

jkasjhjgfg LTRIM(RTRIM(aa_bb_cde))
aragsfdg LTRIM(RTRIM(aa_bb_cde)) aregfafdgfg
sdgsfdagdfg  gadfg
asdgsfdgag LTRIM(RTRIM(aa_bb_cde)) rfghsdfhd

I want to replace each occurence of LTRIM(RTRIM($x)) with

So my output file should be

jkasjhjgfg LENGTH(LTRIM(RTRIM(aa_bb_cde)))=0
aragsfdg LENGTH(LTRIM(RTRIM(aa_bb_cde)))=0 aregfafdgfg
sdgsfdagdfg  gadfg
asdgsfdgag LENGTH(LTRIM(RTRIM(aa_bb_cde)))=0 rfghsdfhd

# 2  
Old 08-08-2007
sed 's/\(LTRIM(RTRIM[^)]*))\)/LENGTH(\1)=0/' input_file

Last edited by Shell_Life; 08-08-2007 at 12:53 PM.. Reason: Assure no ')' after it.
# 3  
Old 08-08-2007
Works...thanks Shell!
# 4  
Old 08-09-2007

try this oneSmilie

sed 's/\(LTRIM(RTRIM(\)\(.*\)\())\)/LENGTH(\1\2\3)=0/' filename

# 5  
Old 08-09-2007
Originally Posted by summer_cherry
try this oneSmilie
sed 's/\(LTRIM(RTRIM(\)\(.*\)\())\)/LENGTH(\1\2\3)=0/' filename

Your solution works fine for the given data sample.

Knowing how the posts are here, there is a strong possibility that
the OP could come back to say the solution is not working for another
situation in the file.

Your code will break for the following scenario:
jkasjhjgfg LTRIM(RTRIM(aa_bb_cde)) abcdef LENGTH(SQRT(aa_bb_cde))

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