I'm trying to write a bash function that will take a command such as xcode-select -v or brew -v that outputs a lot of extra text, and format it to my liking. Just to further the example, say I run xcode-select -v, it will output xcode-select version 2333.. I want to be able to split this string up and only take the 2333 part so I can put it in an echo statement. I want the same function to be able to handle the various outputs of stuff like brew -v, or git --version, etc.

get_version_number() {
    # set local variable to executed arguments that is passed in
    local command="$($@)"
    # set up temp variable and assign to global IFS variable
    OIFS=$IFS
    # set up IFS to split the string on empty space
    IFS=" "
    # read commands output into an array and store it in $array variable
    read -a array <<< "$command"
    # clear out IFS back to what it original was for further use
    IFS=$OIFS
    # echo out array at a particular indices that should be passed in 
    echo ${array[@]}
}

# store output of this command into variable for further usage
version=$(get_version_number xcode-select -v)
echo $version

Edit 1: Originally the idea came from me having to copy/paste these same lines within different conditional blocks...

command=$(git -v)
OIFS=$IFS
IFS=" "
read -a output_array <<< "$command"
IFS=$OIFS
printf "Git version ${output_array[2]} is installed."

command=$(brew -v)
OIFS=$IFS
IFS=" "
read -a output_array <<< "$command"
IFS=$OIFS
printf "Homebrew version ${output_array[1]} is installed."