String difference in Bash

Question

I\'m trying to find a way to determine the difference between two strings in my script. I could easily do this with diff or comm, but I\'m not dealing with files and I\'d pr

Answer 1

Say you have three strings

a="this is a line"
b="this is"
c="a line"

To remove prefix b from a

echo ${a#"$b"}  # a line

To remove suffix c from a

echo ${a%"$c"}  # this is