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Merging Lines based on criteria


 
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# 1  
Merging Lines based on criteria

Hello,

Need help with following scenario.

A file contains following text:

Code:
{beginning of file}
New: This is a new record and it is not
on same line. Since I have lost touch with script
take this challenge and bring all this in one line.
New: Hello losttouch. You seem to be struggling with 
this really simple challenge.
New: It is better that I ask some expert on unix.com
They will show you this is simple enough.
{end of file}

What I am trying to accomplish is to get all the lines starting from "New:" until next "New:" is read; on to one line. Resultant lines should be like:

New: This is a new record and it is not on same line. Since I have lost touch with script take this challenge and bring all this in one line.
New: Hello losttouch. You seem to be struggling with this really simple challenge.
New: It is better that I ask some expert on unix.com.They will show you this is simple enough.

As I mentioned in the above statements, I have lost touch with this, I am really struggling to accomplish this task. Any help is greatly appreciated.

Thanks so much.

EDIT: Needless to say that if I read next "New:" (lets say in any variable) it implies, my previous record is complete and should be displayed or appended to a file.

Last edited by Scrutinizer; 03-29-2012 at 09:23 AM.. Reason: Please Use [code] tags [/code], thank you..
# 2  
Welcome to the forum.

Code:
perl -ne 'chomp; if(/^New:/){print "\n$_ ";$f=1}elsif(!/^New:/ && $f==1){print "$_ "}' inputfile

A different logic:
Code:
perl -ne 'chomp; if(/^New:/){print "$x\n"; $x="$_ "}else{$x .= "$_ "} END {print "$x\n"}' inputfile

This User Gave Thanks to balajesuri For This Post:
# 3  
Code:
awk 'NR>1{gsub(/^New/,"\nNew")}END{printf "\n"}1' ORS=' ' infile


Last edited by ctsgnb; 03-29-2012 at 09:26 AM..
This User Gave Thanks to ctsgnb For This Post:
# 4  
Code:
tr '\n' ' ' < infile | sed 's/ New/\nNew/g'

This User Gave Thanks to complex.invoke For This Post:
# 5  
Thank you everyone for the help! It is greatly appreciated. I used the awk statement and it worked really well. One edit I made to it was by changing the ORS from ' ' to '' (no space). I had to remove space because it was introduced space in and was making the entries less "meaningful".

Thanks once again!

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