3 ms·

I can't understand why. Why?

• sausagefeet 15y ago
  For starters since it event based nothing can happen until you give back control to event loop. Secondly if you add another callback or errback to a Deferred that has already been fired it just calls it with the last result. Note, Deferred is much simpler than I imagine you are thinking it is. It does nothing to handle events it is just a first class way to represent the flow of code.
  • fedd 15y ago
    so adding a callback runs it if there is a result. thanks