Settings
The Settings class provides persistent platform-independent application settings.
Settings.new() Creates a new Settings object.
Settings:set(key, value) Sets the value of setting key to value. If the key already exists, the previous value is overwritten.
Settings:get(key, defaultValue) Returns the value for setting key. If the setting doesn't exist, returns defaultValue. If no default value is specified, nil is returned.
Settings:contains(key) Returns true if there exists a setting called key; returns false otherwis
Settings:remove(key) Removes the setting key.
Settings:sync() Writes any unsaved changes to permanent storage. This function is called automatically when the application suspends or exits, so you normally don't need to call it yourself.
Here is a sample usage:
local settings = Settings.new()
settings:get("current_level", 1)
settings:set("current_level", 2)