q_play.coffee

WILL_REJECT = true

a = ->
  foo = q.defer()
  if WILL_REJECT
    foo.reject()
  else
    foo.resolve()
    
  return foo.promise

b = a.catch (e) ->
  return e
  
b.then (c) ->
  # continue along, no
  # need for moar promises

q_play.js

var WILL_REJECT, a, b;

WILL_REJECT = true;

a = function() {
  var foo;
  foo = q.defer();
  if (WILL_REJECT) {
    foo.reject();
  } else {
    foo.resolve();
  }
  return foo.promise;
};

b = a["catch"](function(e) {
  return e;
});

b.then(function(c) {
  
});

TypeError: Object function () {
var foo;
foo = q.defer();
if (WILL_REJECT) {
foo.reject();
} else {
foo.resolve();
}
return foo.promise;
} has no method 'catch'
at Object. (/Users/heath/ptest.coffee:12:14, :17:17)
at Object. (/Users/heath/ptest.coffee:1:1, :23:4)
at Module._compile (module.js:456:26)