How can I grep complex strings in variables?

Question

I am trying to grep for a small string in a much larger string. Both strings are being stored as variables and here is a code example:

#!/bin/bash

long_str=$(m         


        

Answer 1

Another Bash-specific technique:

if [[ $long =~ $short ]]    # regex match
then
    echo "yes"
fi

But if you don't need the long string in a variable:

if man man | grep $short; then ...

but I'm assuming that was just for the purpose of having an example.