Make shopt change local to function

Question

I\'m trying to write a bash function that uses nocasematch without changing the callers setting of the option. The function definition is:

is_he         


        

Answer 1

The function body can be any compound command, not just a group command ( {} ). Use a sub-shell:

is_hello_world() (
  shopt -s nocasematch
  [[ "$1" =~ "hello world" ]] 
)