# Generate random string.
# Usage: random <LENGTH>
function random() {
	local length="${1}"
	if [[ ${length} == "" ]]; then
		help random
		return 2
	fi
	head /dev/urandom | tr -dc A-Za-z0-9 | head -c${length}
}

# Picks a random file or directory.
function random_file() {
	local IFS=$'\n'
	local dirs=($(ls))
	local total=${#dirs[@]}
	((total--))
	local index=$(shuf -i 0-${total} -n 1)

	printf "%s" ${dirs[$index]}
}