local Util = {}

function Util.round(x)
  if x%2 ~= 0.5 then
    return math.floor(x+0.5)
  end
  return x-0.5
end

function table.copy(t)
  local u = { }
  for k, v in pairs(t) do u[k] = v end
  return setmetatable(u, getmetatable(t))
end

return Util