pick_random_data()
{
    # seed random generator
    RANDOM=$$$(date +%s)

    #take array as parameter
    declare -a argArr="${!1}"

    # pick a random entry from the domain list to check against
    randomResult=${argArr[$RANDOM % ${#argArr[@]}]}

    echo "$randomResult"
}


main()
{

    local user_agent=(
        "Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko"
        "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/602.4.8 (KHTML, like Gecko) Version/10.0.3 Safari/602.4.8"
        "INI_Ibis"
        "tving/5.2.6.4720 CFNetwork/893.14.2 Darwin/17.3.0"
        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36 Edge/15.15063"
        )

    result=pick_random_data user_agent[@]

    echo $result
}

main

test.sh: line 27: user_agent[@]: command not found