Some Lua Stuff

000Readme.md

##Closure / Table hybrid classes

Features:

• Public/Private instance fields
• Public/Private instance methods
• public class methods/fields
• inheritance (only 1 parent)

##Closure/table hybrid switch function

Features:

• Possible to mix functions/values
• Default value
• Kinda switch-like syntax

Class.lua

local Base = {}
Base.foo = function()
  return "Class Method Base"
end
Base.new = function(var)
  local self = {
    public_field = var
  }
  local private = 5
  function self.foo()
    return "Base private: " .. private .. "  - public: " .. self.public_field
  end
  return self
end

local SubClass = {}
SubClass.new = function(initbase, initsub)
  local self = Base.new(initbase)
  self.new_public = initsub
  function self.bar()
    return "SubClass Bar, public: " .. initsub
  end
  return self
end

local t = SubClass.new("hey", "there")
local t2 = SubClass.new("second", "try")
print(t.foo()) -- Base private: 5  - public: hey
print(t.bar()) -- SubClass Bar, public: there
print(t2.foo()) -- Base private: 5  - public: second
print(t2.bar()) -- SubClass Bar, public: try
print(Base.foo()) -- Class Method Base

-- Public fields (in the self-object) can be seen from outside, private variables (locals) cannot
print(t.public_field) -- hey
print(t.private) -- error

Complex_switch.lua

local function switch( config )
    local cases = config.cases
    local default = config.default
    wrapper = function(access)
      result = cases[access]
      if result == nil then
        if type(default) == "function" then
          return default()
        else
          return default
        end
      end
      if type(result) == "function" then
        return result()
      else
        return result
      end
    end
    return wrapper
end
local test = 17
testswitch = switch(
{
  ["cases"] = {
      ["test"] = "YES", -- value case, can also be afunction
      ["fail"] = function() return "Fail " .. test*2 -- function case, can also be a value
  },
  ["default"] = function() return "Default function" .. 5*3 end -- Function default, can be value
}
)

print(testswitch("test")) -- "YES"
print(testswitch("fail")) -- "Fail 34"
print(testswitch("missing")) -- "Default Function 15"

SimpleSwitch.lua

-- Simple Switch Statement without default/missing, respectively default == nil
switch = {
  ["Case 0"] = "Case 0 element",
  ["Case 1"]= "Case 1 element"
}
print(switch["Case 0"]) -- "Case 0 element"
print(switch["haha"]) -- nil