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DOC/README.check-if-empty

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+
+# - 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