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Using sed to insert text between lines

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# 1  
Old 06-29-2016
Using sed to insert text between lines
Hello, I am trying to insert a section of text between lines in another text file.

The new lines to be inserted are:
Code:
abcd[0].efgh[N].zzzz=blah
abcd[0].efgh[N].xxxx=blah

Where N = 0 to 2

Original File:
Code:
abcd[0].efgh[0].wwxx=aaaaa
abcd[0].efgh[0].yyzz=bbbbb
abcd[0].efgh[1].wwxx=aaaaa
abcd[0].efgh[1].yyzz=bbbbb
abcd[0].efgh[2].wwxx=aaaaa
abcd[0].efgh[2].yyzz=bbbbb

Change to:
Code:
abcd[0].efgh[0].wwxx=aaaaa
abcd[0].efgh[0].yyzz=bbbbb
abcd[0].efgh[0].zzzz=blah
abcd[0].efgh[0].xxxx=blah
abcd[0].efgh[1].wwxx=aaaaa
abcd[0].efgh[1].yyzz=bbbbb
abcd[0].efgh[1].zzzz=blah
abcd[0].efgh[1].xxxx=blah
abcd[0].efgh[2].wwxx=aaaaa
abcd[0].efgh[2].yyzz=bbbbb
abcd[0].efgh[2].zzzz=blah
abcd[0].efgh[2].xxxx=blah


This is what I have done so far (and it works with Linux GNU sed), but I am looking for a more elegant way to do it. Perhaps using backreferencing?

Code:
sed "{
/efgh\[0\].yyzz=bbbbb/a abcd[0].efgh[0].wwxx=aaaaa\nabcd[0].efgh[0].xxxx=blah
/efgh\[1\].yyzz=bbbbb/a abcd[0].efgh[1].wwxx=aaaaa\nabcd[0].efgh[1].xxxx=blah
/efgh\[2\].yyzz=bbbbb/a abcd[0].efgh[2].wwxx=aaaaa\nabcd[0].efgh[2].xxxx=blah
}" dataset.txt

Any ideas?

Thanks in advance.
# 2  
Old 06-29-2016
Does it need to be sed?
# 3  
Old 06-29-2016
I'm happy to use awk, perl or python. Just wondered if it was possible using sed?

Thanks.
# 4  
Old 06-29-2016
Actually, thinking twice, it is. Try
Code:
sed 's/\(efgh\[\)\([[:digit:]]\)\(\].yyzz=bbbbb\)/\1\2\3\nabcd[0].efgh[\2].wwxx=aaaaa\nabcd[0].efgh[\2].xxxx=blah/' file
abcd[0].efgh[0].wwxx=aaaaa
abcd[0].efgh[0].yyzz=bbbbb
abcd[0].efgh[0].wwxx=aaaaa
abcd[0].efgh[0].xxxx=blah
abcd[0].efgh[1].wwxx=aaaaa
abcd[0].efgh[1].yyzz=bbbbb
abcd[0].efgh[1].wwxx=aaaaa
abcd[0].efgh[1].xxxx=blah
abcd[0].efgh[2].wwxx=aaaaa
abcd[0].efgh[2].yyzz=bbbbb
abcd[0].efgh[2].wwxx=aaaaa
abcd[0].efgh[2].xxxx=blah

This User Gave Thanks to RudiC For This Post:
tsu3000
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