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deleting the lines at the end of the file.

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Top Forums Shell Programming and Scripting deleting the lines at the end of the file.
# 8  
Old 09-10-2010
Quote:
Originally Posted by shashi792
@Franklin,
I did not understand your question.

I have these problem when i am streaming my text file to a C++ array.

rite now i am manually going to the line 15 and at the end of the line i'm using delete so that the last empty line gets deleted .
I also don't understand your question Smilie, I'm still guessing...maybe this is what you're looking for:
Code:
awk '{printf("%s%s",NL,$0);NL=RS}' file > newfile

# 9  
Old 09-10-2010
in your file if the line always start with a number then try below

Code:
sed  -n '/[0-9]/p' file > newfile

this will give the lines that have numbers in it and all the blank lines should be deleted.. try this....
Last edited by Franklin52; 09-10-2010 at 09:14 AM.. Reason: Please use code tags, thank you!
# 10  
Old 09-10-2010
@ itslee,
Thanks for answering, that was not what i was looking for.

@ franklin,
This is what i wanted exactly, at last found it Smilie, is it possible that i overwrite in the same file instead of using a new file as we use

Code:
sed -i

option
# 11  
Old 09-10-2010
Quote:
Originally Posted by shashi792
@ franklin,
This is what i wanted exactly, at last found it Smilie, is it possible that i overwrite in the same file instead of using a new file as we use

Code:
sed -i

option
awk doesn't have an option to edit files "in place". You can do something like this if the command works fine:
Code:
awk '{printf("%s%s",NL,$0);NL=RS}' file > newfile && mv newfile file

BTW: That's what I meant with delete the last newline character of the file.

Regards
This User Gave Thanks to Franklin52 For This Post:
shashi792
# 12  
Old 09-14-2010
Did you try this:
Did you try any of this remove any empty lines from the file:

HTML Code:
grep -v "^$" <filename> > newfile
or,

HTML Code:
sed 's/^$/d' <filename> > newfile
# 13  
Old 09-14-2010
Quote:
Originally Posted by momin
Did you try any of this remove any empty lines from the file:

HTML Code:
grep -v "^$" <filename> > newfile
or,

HTML Code:
sed 's/^$/d' <filename> > newfile
As mentioned, the OP wants to remove the newline character after the last line not an empty line.

Regards
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