hi 
i have a file 1.txt:
XREAZM02145586k05mkkk
1azeKJLM000255
kopmjjgy
XREAZMNJK015522255521144bvfyj
XREAZM01255hhfe'yg000nnn36poigujj,jjd
nnjjjlm0025962/522
i want:
XREAZM02145586k05mkkk1azeKJLM000255kopmjjgy
XREAZMNJK015522255521144bvfyj
XREAZM01255hhfe'yg000nnn36poigujj,jjdnnjjjlm0025962/522
my code:
awk '!/^XREAZM/{ORS=""}1' 1.txt
but didn't work
thank's
Hi
awk '/XREAZ/{if (x) print x;x=$0;next;}{x=x""$0;}' file
Guru.
That code fails to handle the last set of lines.
@alister
It does work for the input OP has provided.
However, a generic solution would be :
awk '/XREAZ/{if (x) print x;x=$0;next;}{x=x""$0;}END{print x}' file
Guru.
No, it doesn't. How could it when printing is triggered by /XREAZ/ and the final line in the data does not match that pattern?
$ cat dat
XREAZM02145586k05mkkk
1azeKJLM000255
kopmjjgy
XREAZMNJK015522255521144bvfyj
XREAZM01255hhfe'yg000nnn36poigujj,jjd
nnjjjlm0025962/522
$ awk '/XREAZ/{if (x) print x;x=$0;next;}{x=x""$0;}' dat
XREAZM02145586k05mkkk1azeKJLM000255kopmjjgy
XREAZMNJK015522255521144bvfyj
How about
$ nawk '/^XREA/ {printf "\n%s", $0;next} {printf "%s",$0}' file
Only problem is it prints a newline at the beginning.
Hi, try this:
1,
sed -n '/^XREA/p' filename
2,
egrep "^aaa" filename
Another awk:
awk '/XREAZM/ && NR>1{print x}{printf $0}END{print x}' infile
great 
guruprasadpr,alister,agn,skles,Scrutinizer THANK'S
skles your code don't work :rolleyes:
Scrutinizer I did not understand your code
Hi, print x is the same as print "" (since x=""). NR>1 means line number > 1