Re: Lua and composition

[Martin <eden_martin_fuhrspam@...>]

On 03/03/2017 11:32 PM, Petri Häkkinen wrote:
> I'm trying to come up with an example where the OOP style is more cleaner (could you give an example?)..
> e.g. in my mind the syntactic difference between the two styles in the following case is irrelevant in practice:
> 
> obj:draw_rectangle(x, y, w, h)
> vs. 
> canvas_draw_rectangle(obj, x, y, w, h)

I think more OO-variant is when both <canvas> and <obj> are
classes and actual coordinates provided by some class for screen
rectangle:

  canvas:draw_rectangle(obj:get_rectangle())

Alternatively, <obj> may store canvas and draw itself anything
it wish and canvas methods can:

  obj:draw()

where draw() is like self.canvas:draw_rectangle(self:get_rectangle())

-- Martin