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How to remove last comma?

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# 1  
Old 10-29-2013
How to remove last comma?
Hi Gurus,

I have file like below:
Code:
a
b
c
d

..
I want to get
Code:
'a','b','c', 'd'

I try to use below command to get it, but I got one extra comma
Code:
sed "s/.*/'&'/" code_LIST.txt |tr -s '\n' ","

I got below result:
Code:
'a','b','c','d',

there is one extra comma at end of the line.
How can I remove this extra comma and get result like:
Code:
'a','b','c','d'

Thanks in advance
# 2  
Old 10-29-2013
Try

Code:
$ echo "'a','b','c','d'," | awk 'gsub(/,$/,x)'
'a','b','c','d'

OR

Code:
$ echo "'a','b','c','d'," | sed 's/,$//g'
'a','b','c','d'

OR
Code:
$ echo "'a','b','c','d'," | grep -Po '.*(?=,)'
'a','b','c','d'

Last edited by Akshay Hegde; 10-29-2013 at 04:33 PM..
This User Gave Thanks to Akshay Hegde For This Post:
ken6503
# 3  
Old 10-29-2013
Code:
sed -n "s/.*/'&'/;1{h;d};H;\${x;s/\n/,/g;p;q}" code_LIST.txt

Emanuele
This User Gave Thanks to targzeta For This Post:
ken6503
# 4  
Old 10-29-2013
Code:
 sed -e 's/^/\x27/;s/$/\x27/' input_file | sed -e ':a;N;$!ba;s/\n/,/g'

Code:
 perl -pe 's/^(.*)\n/\x27$1\x27,/;s/,$// if eof' input_file

Last edited by greet_sed; 10-29-2013 at 04:59 PM.. Reason: Add perl solution
This User Gave Thanks to greet_sed For This Post:
ken6503
# 5  
Old 10-29-2013
Hi,


one more awk approach.

Code:
awk -vORS="," -vs1="'" '{print s1$0s1}'  text_data1213 | sed 's/, $//g'

output will be as follows.


Code:
'a','b','c','d'



Thanks,
R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
ken6503
# 6  
Old 10-29-2013
Another awk approach:
Code:
awk '{gsub(/[a-z]/,"\x27&\x27");$1=$1}1' RS= OFS=, file

This User Gave Thanks to Yoda For This Post:
ken6503
# 7  
Old 10-29-2013
try also:
Code:
awk '$1=$1 {printf ("\x27%s\x27\n", $0);}' RS= OFS="','" infile

This User Gave Thanks to rdrtx1 For This Post:
ken6503
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