chaining promises with q.js

Question

I\'m trying to understand how promise chaining works. I\'m using q.js. Here\'s what I\'m playing with.

var Q = require(\"q\"); // npm install q

// the functio         


        

Answer 1

I know javascript doesn't have static types, but you need to think about types here.

Q(1);                             // has type Promise[Int]
function (n) { return Q(2); }     // has type Int => Promise[Int]

Q.then needs the second.