Does anyone know to what extend the new yield operator replaces the need for promises? Can it be used for most of promises' purposes or do the latters have their particularly nice use cases? It's still confusing after a while.
[1] https://github.com/mozilla/mozilla-central/blob/master/toolk...
[2] https://developer.mozilla.org/en-US/docs/Mozilla/JavaScript_...
[3] http://dxr.mozilla.org/mozilla-central/search?tree=mozilla-c...