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how to append multiple lines to the last line of a file

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# 1  
Old 11-04-2011
how to append multiple lines to the last line of a file
Hello,

This is what I am trying to achieve:

Code:
 
file1
 
a
b
c
d

Code:
 
file2
 
e
f
g
h
i
j
k
i
m

Code:
 
output
 
a
b
c
d==e==f==g==h==i==j==k==i==m

Just like my last post if you read it, I am doing this using foreach but when the numbers go up it gets really slow. is there a way to achieve this using awk or sed that would be quick when used in a script?

Thanks,
# 2  
Old 11-04-2011
Code:
# sed "$ s/.*/&$( awk '{printf ("=%s", $0)} END {printf ("\n")}' 2.txt)/g" 1.txt
a
b
c
d=e=f=g=h=i=j=k=i=m

This User Gave Thanks to CarloM For This Post:
smarones
# 3  
Old 11-04-2011
Hi CarloM,

Already logged out of my solaris account, but it seems like its exactly what I need.
I will try it tomorrow and let you know.

Thanks
# 4  
Old 11-06-2011
Hi CarolM,

I am using tcsh to write the script I believe your solution is for Bash, it does not work when I run it.

can you or anyone esle provide a tcsh awk or sed command which would realize this?

Thanks
# 5  
Old 11-06-2011
Tested in tcsh...
Code:
awk 'NR==FNR{a[++j]=$0;next}{b=b"=="$0}END{for(i=1;i<j;i++){print a[i]} printf("%s%s\n",a[j],b)}' file1.txt file2.txt

--ahamed
# 6  
Old 11-06-2011
Thanks ahamed but the solution does a little bit more than what I ask for:

Code:
 
awk 'NR==FNR{a[++j]=$0;next}{b=b"=="$0}END{for(i=1;i<j;i++){print a[i]} printf("%s%s\n",a[j],b)}' fil1.txt file2.txt
==a==b==c==d==e==f==g==h==i==j==k==l==m==n

I want lines from file2 to be added only to the last line of file1 and only the lines that are appended should have 2 equal signs before and 2 after.

your solution puts 2 equal signs even before and after the begining lines of file1 and changes all the lines in both files in to one line.
# 7  
Old 11-06-2011
Its working for me though...
Code:
bt:/tmp# echo $0
tcsh
bt:/tmp# cat 1.txt
a
b
c
d
bt:/tmp# cat 2.txt
e
f
g
h
i
j
k
i
m
bt:/tmp# awk 'NR==FNR{a[++j]=$0;next}{b=b"=="$0}END{for(i=1;i<j;i++){print a[i]} printf("%s%s\n",a[j],b)}' 1.txt 2.txt
a
b
c
d==e==f==g==h==i==j==k==i==m

--ahamed
This User Gave Thanks to ahamed101 For This Post:
smarones
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