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Move a line to top of the file

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# 1  
Old 10-16-2013
Move a line to top of the file
Hi,
I have a following file and it has only one occurrence of line that says "Output view:". It could be in middle somewhere ( i don't know the exact location ). I want to move it as the first line of the file.

Input
Code:
AAA
BBBB
CCCC
Output view:
XXXX
YYYY
ZZZZ

Output should be:
Code:
Output view:
AAA
BBBB
CCCC
XXXX
YYYY
ZZZZ

# 2  
Old 10-16-2013
Code:
sed '/Output view:/d;1i\Output view:' file

Emanuele
# 3  
Old 10-16-2013
Lazy (but easy to read) solution...
Code:
grep "Output view:" input >output
grep -v "Output view:" input >>output

But no doubt it must be some more elegant solution ...

@Alister :
Any "ed" suggestion ? Smilie
Last edited by ctsgnb; 10-16-2013 at 10:53 AM..
# 4  
Old 10-16-2013
Hi,
Another sed solution (also work with regular expression):
Code:
 sed -n '1,/Output view:/{/Output view:/{G;s/\n//p;b;};H;b};p' file

Regards.
# 5  
Old 10-16-2013
Thanks guys!
# 6  
Old 10-16-2013
Yet another way with the trusty ole ex...
Code:
ex -s +'/^Output view:/m0 | x' file

This User Gave Thanks to shamrock For This Post:
Scrutinizer
# 7  
Old 10-16-2013
Two more:
Code:
awk '/Output view:/{f=1; $0=$0 p; p=x} !f{p=p RS $0} f' file

or perhaps simply
Code:
awk 'NR==1{print s} $0!~s' s="Output view:" file

This User Gave Thanks to Scrutinizer For This Post:
RavinderSingh13
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