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Add text at the end of line conditionally

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# 1  
Old 02-02-2011
Add text at the end of line conditionally
Hi All,

I have a file as below:

Code:
cat myfile

abcdef
NA
rwer
tyujkl
na

I wish to add the text ".txt" at the end of all lines except the lines starting with NA or na.

I know i can add text at the end of line using following command but I am not sure how to valiate the condition.

Code:
sed 's/$/\.txt/g' myfile >temp
mv temp myfile

Can any one help me on how to achieve this? Your help is highly appreciated.

Regards
Angshuman
# 2  
Old 02-02-2011
try
Code:
awk '{print ($0~/^NA|na/?$0:$0".txt")}' urfile

This User Gave Thanks to yinyuemi For This Post:
angshuman
# 3  
Old 02-02-2011
Code:
awk '/^na|^NA/||$0=$0".txt"' file

This User Gave Thanks to Scrutinizer For This Post:
angshuman
# 4  
Old 02-02-2011
Code:
sed '/^[Nn][Aa]$/{p;d;};s/.*/&.txt/' infile

This User Gave Thanks to ctsgnb For This Post:
angshuman
# 5  
Old 02-02-2011
Code:
sed '/^[Nn][Aa]/!s/$/.txt/' file

This User Gave Thanks to Scrutinizer For This Post:
angshuman
# 6  
Old 02-02-2011
@Scruti,
lol yes, it's better Smilie

what is suppposed to happen if the file contain a line like

Code:
Na, i am not a line like the others !

??
This User Gave Thanks to ctsgnb For This Post:
angshuman
# 7  
Old 02-02-2011
Code:
 $  ruby -ne 'chomp; print ($_ !~ /^\s*(NA|na)\s*$/i ) ? $_+".txt\n": $_+"\n" ' file

This User Gave Thanks to kurumi For This Post:
angshuman
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