Example OOP in lua and Corona SDK

blarg.lua

local Blarg = {}
local Blarg_mt = {__index = Blarg}

function Blarg:new()
  local self = {}
  setmetatable( self, Blarg_mt )
  
  self.default = 5
  
  return self
end

function Blarg:minimum(val1, val2)
  if(val1 < val2) then
    return val1
  elseif(val1 > val2) then
    return val2
  else
    return "EQUAL"
  end
end

function Blarg:maximum(val1, val2)
  if(val1 > val2) then
    return val1
  elseif(val1 < val2) then
    return val2
  else
    return "EQUAL"
  end
end

function Blarg:toDefault(val)
  if(val > self.default) then
    return tostring(val) .. " is greater than the default"
  elseif(val < self.default) then
    return tostring(val) .. " is less than the default"
  else
    return tostring(val) .. " and the default are equal"
  end
end

function Blarg:destroy()
  --use this to remove memory intensive objects you create
  --note that it is not called automagically
end


return Blarg