readvar(){
	if [[ ${1} != *[a-zA-Z0-9_]* || ${1} == *[-.]* ]]; then
		echo "${@}"
	elif [[ ${!1} ]]; then
		local var=${1}[@]

		echo ${!var}
	fi
}
readvar(){
	if [[ ${1} != *[a-zA-Z0-9_]* || ${1} == *[-.]* ]]; then
		echo "${@}"
	elif [[ ${!1} ]]; then
		local var=${1}[@]

		echo ${!var}
	else
		echo "${@}"
	fi
}
Return the variable value by default
Return the variable value by default
