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problems with sed

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# 1  
Old 08-18-2010
problems with sed
Code:
$ echo "a,0,0,0,b,0" | sed 's/,0,/,1,/g'

gives output as
Code:
$ a,1,0,1,b,0

rather than as
Code:
a,1,1,1,b,0

how can i solve this problem

Thanks a lot in advance....

Moderator's Comments:
Mod Comment Use code tags.
Last edited by zaxxon; 08-18-2010 at 05:18 AM..
# 2  
Old 08-18-2010
With awk:
Code:
T=b; echo "a,0,0,0,b,0" | awk -F"$T" -v T=$T '{gsub(/0/,"1",$1); print $1 T $2}'
a,1,1,1,b,0

Not sure if there are more similar lines and how they look. Maybe you need more generic code then.
# 3  
Old 08-18-2010
Code:
echo "a,0,0,0,b,0" | sed 's/0,/1,/g'

if you really want to use only ',0,' format you need to do one more round of substitution

Code:
echo "a,0,0,0,b,0" | sed 's/,0,/,1,/g' | sed 's/,0,/,1,/g'

Last edited by rajamadhavan; 08-18-2010 at 05:43 AM.. Reason: additional input
This User Gave Thanks to rajamadhavan For This Post:
manishma71
# 4  
Old 08-18-2010
Quote:
Originally Posted by zaxxon
With awk:
Code:
T=b; echo "a,0,0,0,b,0" | awk -F"$T" -v T=$T '{gsub(/0/,"1",$1); print $1 T $2}'
a,1,1,1,b,0

Not sure if there are more similar lines and how they look. Maybe you need more generic code then.
Below case does not work

Code:
T=b; echo "a,0.1,0,0,b,0" | awk -F"$T" -v T=$T '{gsub(/0/,"1",$1); print $1 T $2}'

output should be
Code:
a,0.1,1,1,b,0

but it is
Code:
a,1.1,1,1,b,0

# 5  
Old 08-18-2010
Code:
echo "a,0,0,0,b,0" |sed 's/0,/1,/g'
echo "a,0,0,0,b,0" |sed 's/0/1/1;s/0/1/1;s/0/1/1'

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