Sed to add new line while replacing comma-CodePudding

I have a list like below : release=abc,xyz,pqr,bnm and as output I need

abc
xyz
pqr
bnm

I have tried below using sed , it successfully removes , but not able to insert new line after comma , if can help pls

release=abc,xyz,pqr,bnm
for i in $release;do
    b=`echo $i| sed 's/,/\\n/g'`
    echo $b
done

output: abc xyz pqr bnm which is not expected here as need new line

CodePudding user response：

release=abc,xyz,pqr,bnm

echo "${release//,/$'\n'}"

Output

abc
xyz
pqr
bnm

With your approach using sed

release=abc,xyz,pqr,bnm

echo "$release" | sed 's/,/\n/g'

CodePudding user response：

There is no need for a loop, as the i in the loop is abc,xyz,pqr,bnm

You could also just translate the newlines to commas:

release=abc,xyz,pqr,bnm
tr , '\n' <<< $release

Output

abc
xyz
pqr
bnm

If there should be a non whitespace char other than a comma before actually match the comma, you can use sed with a capture group:

release=abc,xyz,pqr,bnm
sed 's/\([^[:space:],]\),/\1\n/g' <<< $release