# - Ansible List
# -
# - Python lists have a truthiness of False when empty. So you
# - can use:
# -    when: <listname>
# -
# - Example:
# -    root_user: {} or
# -    root_user:
# -      - value1
# -      - value2
# -
# - Check if list 'root_user' is empty:
# -    when: root_user


# - Ansible Array /Scalar
# -
# - use:
# -    when <var> is defined and <var>.lenght > 0
# -
# - Example:
# -    apt_lxc_host_pkgs: []
# -    apt_lxc_host_pkgs:
# -      - bridge-utils
# -      - lxc
# -      - btrfs-tools
# -      - lua5.3
# -
# - Check if list 'apt_lxc_host_pkgs'' is empty:
# -    when: apt_lxc_host_pkgs is defined and apt_lxc_host_pkgs.length > 0