General Bash function that creates selection interface from arbitrary array (See comment below for usage example)

selectFromArray.bash

selectFromArray() {
    if [ "$1" ]; then
        local IFS=$'\n' selected= idx=$2 tmp=()
        eval "local arr=( \${$1[*]} )"

        if [ ${#arr[@]} -eq 1 ]; then
            selected="${arr[0]}"
        elif [ ${#arr[@]} -gt 1 ]; then
            select a in "QUIT!" "${arr[@]}"; do
                [ "${a}" = "QUIT!" ] && break
                selected="${a}"
                break
            done
        fi

        if [ "${idx}" ]; then
            unset IFS
            read -ra tmp <<< "${selected}"
            [ "${idx}" -lt "${#tmp[@]}" ] && echo "${tmp[$idx]}"
        else
            [ "${selected}" ] && echo "${selected}"
        fi
    fi
}

Example

When you quite don't know Bash select built-in command, type help select at your terminal

### Create a Bash array
$ arr=(foo bar baz)

### Call the function ( Notice that the array variable doesn't use $ symbol! )
$ selectFromArray arr

### That will let you choose something in the array or nothing. 
### Choose 0 or 1 and the selection will abort
1) QUIT!
2) foo
3) bar
4) baz
#? 0

### E.g., choose 3 and you'll get 'bar'
$ selectFromArray arr
1) QUIT!
2) foo
3) bar
4) baz
#? 3
bar