在同一张表中调用函数的更简单方法？

Question

我想知道是否有一种更简单的方法来调用同一表的函数或设置变量，而不是编写表名。

例如，在下面的示例代码中，有没有更简单的方法可以从MyClass.test()调用MyClass.setup()函数？

local MyClass = {}

function MyClass.test()
  print("Hello")
end

function MyClass.setup()
  MyClass.test()
end

MyClass.setup()

Answer 1

如果您使用:而不是.来调用函数，则Lua隐式插入对表本身的引用作为第一个参数（类似于this指针是一些对象，面向语言）。然后您可以说self:test()摆脱名称依赖。

local MyClass = {
    test = function(self)
        print("Hello")
    end,
    setup = function(self)
        self:test()
    end
}

MyClass:setup()

Answer 2

您可以将模块表设置为环境：

Array
(
[1] => Array
    (
        [0] => Array
            (
                [userID] => 316
                [fullName] => S J
                [employeeSupervisiorID] => 1
                [employeePhoto] => 1537274885.jpg
                [childern] => Array
                    (
                        [0] => Array
                            (
                                [userID] => 336
                                [fullName] => S G
                                [employeeSupervisiorID] => 316
                                [employeePhoto] => 1537274919.jpg
                                [childern] => Array
                                    (
                                        [0] => Array 
                                            (
                                                [userID] => 423
                                                [fullName] => Test User
                                                [employeeSupervisiorID] => 336
                                                [employeePhoto] => 1537275091.jpg
                                            )
                                    )
                            )

                        [1] => Array
                            (
                                [userID] => 337
                                [fullName] => R K
                                [employeeSupervisiorID] => 316
                                [employeePhoto] => 1537274940.jpg
                                [childern] => Array
                                    (
                                        [0] => Array
                                            (
                                                [userID] => 418
                                                [fullName] => J D
                                                [employeeSupervisiorID] => 337
                                                [employeePhoto] => 1537274978.jpg
                                            )
                                    )
                            )

                        [2] => Array
                            (
                                [userID] => 420
                                [fullName] => A S
                                [employeeSupervisiorID] => 316
                                [employeePhoto] => 1537274997.jpg
                            )

                    )

            )

        [1] => Array
            (
                [userID] => 405
                [fullName] => De B
                [employeeSupervisiorID] => 1
                [employeePhoto] => 1537274961.jpg
                [childern] => 
            )

        [2] => Array
            (
                [userID] => 421
                [fullName] => Sanjay j
                [employeeSupervisiorID] => 1
                [employeePhoto] => 1537275044.png
                [childern] => 
            )

    )

 )

Answer 3

local MyClass = {}
function MyClass:Setup()
    print('hello...Setup')
end

function MyClass:Test()
    self:Setup() -- self -> MyClass
    print('hello...Test')
end

MyClass:Test()
-- or inherit
local newClass = MyClass
newClass:Test()

Answer 4

local MyClass = {}

function MyClass.test()
  print("Hello")
end

function MyClass.setup(self)
  self.test()
end

MyClass.setup(MyClass)

密钥是self。在状态下，MyClass是obj，由{}创建，因此您可以使用MyClass.Test(MyClass)传入参数MyClass来使用{{1 }} obj。

ps ：
Lua提供的语法糖：
MyClass.setup（MyClass）==> MyClass：setup（）