Lua Promise

[ChrisMAN]

Last week I wrote an emitter for doing easy events on objects. This week I wrote a library for handling deferred values. This is really nice for doing asynchronous programming. These 2 components are all that I really need to do async/evented programming.

 

https://github.com/friesencr/lua_promise

 

Promises are one of those things that are so elemental / simple they can be hard to grasp.

 

Here is a small example of what I might use it for.

 

function UsePotion()
 SelectPotion()
   :done(function(potion)
  NomNom(potion)
   end)
end
function SelectPotion()
 local p = Promise:new()
   gui = LoadPotionGui()
   gui:on('select_potion', function()
  p:resolve(gui.selected_potion)
   end)
 return p
end

 

 

Peace,

Chris