Merge lines based on match

Shell Programming and Scripting
1

I am trying to merge two lines to one based on some matching condition.

The file is as follows:

Matches filter:
'request ', timestamp, <HTTPFlow
 request=<GET:
Matches filter:
'request ', timestamp, <HTTPFlow
 request=<GET:
Matches filter:
'request ', timestamp, <HTTPFlow
 request=<GET:

I want to merge the line ending with <HTTPFlow with the next line request. The expected output is:

Matches filter:
'request ', timestamp, <HTTPFlow request=<GET:
Matches filter:
'request ', timestamp, <HTTPFlow request=<GET:
Matches filter:
'request ', timestamp, <HTTPFlow request=<GET:

Thanks.

2

Hello Jamie_123,

Following may help you in same.

 awk '(NR%2==0){A=$0;getline;print A OFS $0;NR++;next};{print}'  Input_file

Output will be as follows.

Matches filter:
'request ', timestamp, <HTTPFlow  request=<GET:
Matches filter:
'request ', timestamp, <HTTPFlow  request=<GET:
Matches filter:
'request ', timestamp, <HTTPFlow  request=<GET:

Thanks,
R. Singh

1 Like
3

Try also

awk '/<HTTPFlow$/ {getline X; $0 = $0 X} 1' file
1 Like
4 
perl -pe 's/(<HTTPFlow)\n/$1 /' jamie.file

---------- Post updated at 09:35 AM ---------- Previous update was at 08:23 AM ----------

awk '/<HTTPFlow$/ {printf $0;next}1' jamie.file
1 Like
5

Some more:

awk '!/<HTTPFlow$/{$0=$0 RS} 1' ORS= file

awk '1;!/<HTTPFlow$/{print RS}' ORS= file

awk '{ORS=/<HTTPFlow$/?x:RS}1' file
6

printf $0 will do terrible things if $0 has % signs!
Correct is printf "%s",$0
--
A sed solution:

sed '/<HTTPFlow$/ {$!N; s/\n//;}' file
7

Hello Scrutinizer,

For code:

 awk '{ORS=/<HTTPFlow$/?x:FS}1' Input_file

It will give output as follows.

 Matches filter: 'request ', timestamp, <HTTPFlow request=<GET: Matches filter: 'request ', timestamp, <HTTPFlow request=<GET: Matches filter: 'request ', timestamp, <HTTPFlow request=<GET:

We can change a bit to it to as follows:

 awk '{ORS=/<HTTPFlow$/?FS:"\n"}1' Input_file

Output will be as follows then.

Matches filter:
'request ', timestamp, <HTTPFlow  request=<GET:
Matches filter:
'request ', timestamp, <HTTPFlow  request=<GET:
Matches filter:
'request ', timestamp, <HTTPFlow  request=<GET:

Thanks,
R. Singh

1 Like
8

Certainly a typo

awk '{ORS=/<HTTPFlow$/?x:RS}1' file

x is "", while FS adds another space.

1 Like
9

Indeed Ravinder and MadeInFermany, that should be RS, not FS. Corrected it in my post...