Simple implementation methods such as Lua object-oriented programming

Let’s take a look at a program:

Copy the codeThe code is as follows:

function create(name, id)
      local obj = { name = name, id = id }
      function obj:SetName(name)
        = name
      end
      function obj:GetName()
        return
      end
      function obj:SetId(id)
        = id
      end
      function obj:GetId()
        return
      end
      return obj
   end

o1 = create("Sam", 001)

print("o1's name:", o1:GetName(), "o1's id:", o1:GetId())

o1:SetId(100)
o1:SetName("Lucy")

print("o1's name:", o1:GetName(), "o1's id:", o1:GetId())

Output result:

Copy the codeThe code is as follows:

o1's name: Sam o1's id: 1 

o1's name: Lucy o1's id: 100

Object factory pattern:

The create function like the previous code

Use table to represent objects:

Put the object's data and methods into a table. Although there are no private members hidden, it is completely acceptable for simple scripts.

Definition of member methods:

Copy the codeThe code is as follows:

function obj:method(a1,a2,…)…end --equivalent to
function (self,a1,a2,…)…end --equivalent to

    =function(self,a1,a2,...)...end

Calling member methods:

Copy the codeThe code is as follows:

obj:method(a1,a2,...) --equivalent to

    (obj,a1,a2,...)