In Lua, you can create classes by using tables and metatables. The get/set method is a commonly used way to access and modify class properties in Lua.
Here is an example:
-- create a class
Person = {}
-- create a constructor to instantiate the object
function Person:new(name, age)
local obj = {}
setmetatable(obj, self)
self.__index = self
obj.name = name
obj.age = age
return obj
end
-- create accessor methods for name and age properties
function Person:get_name()
return self.name
end
function Person:set_name(new_name)
self.name = new_name
end
function Person:get_age()
return self.age
end
function Person:set_age(new_age)
self.age = new_age
end
-- create an instance of Person
local person1 = Person:new("John", 30)
-- access the name and age properties using get methods
print(person1:get_name())
print(person1:get_age())
-- change the name and age properties using set methods
person1:set_name("Maria")
person1:set_age(25)
-- access the updated properties using get methods
print(person1:get_name())
print(person1:get_age())
In this example, we create a class Person with a constructor that initializes its name and age properties, and we also create get and set methods to access and modify these properties.
To create an instance of Person, we call Person:new and pass the name and age parameters.
To access the properties, we use the get methods get_name and get_age, and to modify the properties, we use the set methods set_name and set_age.
Finally, we call the get methods again to verify that the properties were successfully modified.