Editing WoW:Object-oriented programming (section)

=== Example Class ===
This is the fully written class we have created through the above methods. It has a constructor, creates the required fields, and gives each instance two functions: isAlliance and isHorde, which returns true if the character's race is set to an Alliance or Horde race, respectively. It also has a function load(), which loads data given a Unit ID via the Blizzard API.

   Character = {};
   Character.__index = Character;
   function Character:new()
      local self = {};
      setmetatable(self, Character);
      self.name = "Unknown";
      self.race = "Unknown";
      self.class = "Unknown";
      self.level = 0;
      return self;
   end
   function Character:load(uid)
      if ~UnitExists(uid) then
         return false;
      end
      self.name = UnitName(uid);
      self.race = UnitRace(uid);
      self.class = UnitClass(uid);
      self.level = UnitLevel(uid);
      return true;
   end
   function Character:isAlliance()
      if ( self.race == "Human"        or
           self.race == "Night Elf"    or
           self.race == "Dwarf"        or
           self.race == "Gnome"        or
           self.race == "Draenei"
         )
      then return true;
      else return false;
      end
   end
   function Character:isHorde()
      if (self.race == "Unknown") then
         return false;
      else
         return ~self:isAlliance();
      end
   end

And we can quickly use this class to get information about our 40 raid members, and store them in a table:

   local units = {};
   for x = 1, 40 do
      units[x] = Character:new();
      units[x]:load("raid"..x);
   end