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how do i join two lines from a input file

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Top Forums Shell Programming and Scripting how do i join two lines from a input file
# 8  
Old 02-02-2011
Quote:
Originally Posted by yinyuemi
Code:
sed 'N;s/\n//'

Don't think that works if the file has an odd number of lines.

Code:
$ cat file
1
2
3
4
5

$ sed 'N;s/\n//' file
12
34

But a slight change:
Code:
$ sed '$!N;s/\n//' file
12
34
5

# 9  
Old 02-02-2011
Hi Scottn,
it worked on my computer,
Code:
 
echo "1
2
3
4
5" |sed 'N;s/\n//'
12
34
5

Also, I think you are right if the code would be more robust after adding "$!", thanks!
# 10  
Old 02-02-2011
For me not:

Code:
echo "1
2
3
4
5" |sed 'N;s/\n//'
12
34

I will try them on Solaris, and whichever works is the one to go with - it doesn't get any more basic than that Smilie

edit:
OK, the results are in Smilie

Code:
# uname -a
SunOS sol10 5.10 Generic_141445-09 i86pc i386 i86pc
# sed 'N;s/\n//' file
12
34
# sed '$!N;s/\n//' file
12
34
5
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