dofile("util.lua")

ice_cream_scoops = {
   "vanilla",
   "chocolate";

   sprinkles = true
}

greek_numbers = {
   ena = "one",
   dyo = "two",
   tria = "three"
}

mt = {
   __tostring = table_to_string
}

setmetatable(greek_numbers, mt)

Villain = {
   health = 100,

   new = function(self, name)
      obj = {
         name = name,
         health = self.health
      }
      setmetatable(obj, self)
      self.__index = self
      return obj
   end,

   take_hit = function(self)
      self.health = self.health - 10
   end
}

dietrich = Villain:new("Dietrich")

SuperVillain = Villain:new()
function SuperVillain:take_hit()
   self.health = self.health - 5
end

joker = SuperVillain:new("Joker")

function fibonacci()
   local m = 1
   local n = 1

   while true do
      coroutine.yield(m)
      m, n = n, m+n
   end
end

generator = coroutine.create(fibonacci)

-- Easy
function concatenate(a1, a2)
   local new = {}
   for i = 1, #a1 do
      new[#new+1] = a1[i]
   end
   for i = 1, #a2 do
      new[#new+1] = a2[i]
   end
   return new
end

l1 = {1,2,3}
l2 = {4,5,6,7,8}

-- Medium -- ????????????????????????????
-- function _G.__add(self, v)
--    return concatenate(self, v)
-- end