Syntax hack to let you use the equals operator on two tables to check if table one is a member of table two

gistfile1.lua

Set = {}
Set.mt = {}

function Set.new(t)
  local set = {}
  setmetatable(set, Set.mt)
  for i,v in ipairs(t) do set[i] = v end
  return set
end

Set.mt.__eq = function(a, b)
  local l = (table.maxn(a) >= table.maxn(b)) and a or b
  
  for _,v in ipairs(l) do
    if a[1] == v then return true end
  end

  return false
end

if Set.new({"Rogue"}) == Set.new({"Rogue", "Shaman", "Warrior"}) then
  print("true")
else
  print("false")
end