gistfile1.lua

----------------variant A

local function somefunc(self,a) 
    print("Have: "  .. dump(self.have) .. " GOT: " .. a)
end

local sometable = {}

sometable.tablefunc = somefunc
sometable.have = "havesomething"


sometable:tablefunc("gettingsomething")


------------------variant b

local sometable = {}
function sometable:tablefunc(a)
    print("Have: "  .. dump(self.have) .. " GOT: " .. a)
end
sometable.have = "havesomething"
sometable:tablefunc("gettingsomething")

local someclass = {}
someclass.__index = someclass
function someclass:func(a)
    print("Have: "  .. dump(self.have) .. " GOT: " .. a)
end

local function new_someobject(have)
    local someobject = {}
    someobject.have = have
    return setmetatable(someobject, someclass)
end

local someobject = new_someobject("havesomething")
someobject:func("gettingsomething")

assert(someobject.func == new_someobject().func)