Combining chunks of data

Shell Programming and Scripting
1

Hi there! Need help on some issue, I have data like this:

123
456

789
012

i need it to be like this:

123789
456012

Anyone has any idea how to do this? Thanks!

Regards,
Ken

2

Use code tags as Franklin52 stated in his moderator notice in your post, thanks.

It could be written easier maybe, but works for this example:

$ awk '{a[NR]=$1; b[NR]=$2} END{for(x=1; x<=NF; x++){s1?s1=s1""a[x]:s1=a[x]; s2?s2=s2""b[x]:s2=b[x]}; print s1 ORS s2}' FS="\n" RS="\n\n" infile
123789
456012
3

Thanks!

If I have more than 2 chunk then does it mean that I'll have to add on to the command? Thanks again!

4

The code I have given is not very generic. Do you mean more than 2 chunks like this:

aaa
bbb

ccc
ddd

eee
fff
...

... or like this:

aaa
bbb
ccc
ddd

eee
ffff
ggg
hhh

?

For the 1st example it should still work. You can simply try it out.

5

You can give this a try:

awk '!NF{c=0;next} {a[c++]=a[c] $0} END{for(i in a) print a}' file
6 
awk 'BEGIN{f=1;i=1}{if(length($0)==0){f=0;k=1;next};if(f==1){a=$1;i++}else{if(f==0&&k<i){print a[k],$1;k++}else{f=1;i=1}}}' inputfile
7

Not that easy. Check the required output again.

8

sorry for interpreting output wrongly try this

awk 'BEGIN{f=1;i=1}{if(length($0)==0){f=0;k=1;next};if(f==1){a=$1;i++}else{if(f==0&&k<i){print a[k],$1;k++}else{f=1;i=1}}}' inputfile
9 
awk '{
n=split($0,b,RS)
for(i=1;i<=n;i++)
 a=a?ab:b
}
END {
for(i=1;a;i++)
 print a
}' RS= infile