Regular expressions replace optional underscores … here is a solution to the problem.
Regular expressions replace optional underscores
If the underscore is present, I need to remove it.
string VIEW VXABC expected result VIEW ABC
string VIEW V_XABC expected result VIEW ABC
This is my attempt, but I don’t know the result
echo "VIEW VXABC" |sed 's/VIEW V_? X/VIEW ABC/'
VIEW VXABC
Solution
[me@home]$ echo VIEW V_XABC | sed -r 's/VIEW V_? X/VIEW /'
VIEW ABC
[me@home]$ echo VIEW VXABC | sed -r 's/VIEW V_? X/VIEW /'
VIEW ABC
Note the -r
option. fromman page :
-r, --regexp-extended
use extended regular expressions in the script.