examples/weather/angular.js
function(name, args) {
        var empty = [],
            namedListeners,
            scope = this,
            stopPropagation = false,
            event = {
              name: name,
              targetScope: scope,
              stopPropagation: function() {stopPropagation = true;},
              preventDefault: function() {
                event.defaultPrevented = true;
              },
              defaultPrevented: false
            },
            listenerArgs = concat([event], arguments, 1),
            i, length;

        do {
          namedListeners = scope.$$listeners[name] || empty;
          event.currentScope = scope;
          for (i=0, length=namedListeners.length; i<length; i++) {

            // if listeners were deregistered, defragment the array
            if (!namedListeners[i]) {
              namedListeners.splice(i, 1);
              i--;
              length--;
              continue;
            }
            try {
              namedListeners[i].apply(null, listenerArgs);
              if (stopPropagation) return event;
            } catch (e) {
              $exceptionHandler(e);
            }
          }
          //traverse upwards
          scope = scope.$parent;
        } while (scope);

        return event;
      }
function(name, args) {
        var empty = [],
            namedListeners,
            scope = this,
            stopPropagation = false,
            event = {
              name: name,
              targetScope: scope,
              stopPropagation: function() {stopPropagation = true;},
              preventDefault: function() {
                event.defaultPrevented = true;
              },
              defaultPrevented: false
            },
            listenerArgs = concat([event], arguments, 1),
            i, length;

        do {
          namedListeners = scope.$$listeners[name] || empty;
          event.currentScope = scope;
          for (i=0, length=namedListeners.length; i<length; i++) {

            // if listeners were deregistered, defragment the array
            if (!namedListeners[i]) {
              namedListeners.splice(i, 1);
              i--;
              length--;
              continue;
            }
            try {
              namedListeners[i].apply(null, listenerArgs);
              if (stopPropagation) return event;
            } catch (e) {
              $exceptionHandler(e);
            }
          }
          //traverse upwards
          scope = scope.$parent;
        } while (scope);

        return event;
      }
@ngdoc function
@name ng.$rootScope.Scope#$emit
@methodOf ng.$rootScope.Scope
@function

@description
Dispatches an event `name` upwards through the scope hierarchy notifying the
registered {@link ng.$rootScope.Scope#$on} listeners.

The event life cycle starts at the scope on which `$emit` was called. All
{@link ng.$rootScope.Scope#$on listeners} listening for `name` event on this scope get notified.
Afterwards, the event traverses upwards toward the root scope and calls all registered
listeners along the way. The event will stop propagating if one of the listeners cancels it.

Any exception emitted from the {@link ng.$rootScope.Scope#$on listeners} will be passed
onto the {@link ng.$exceptionHandler $exceptionHandler} service.

@param {string} name Event name to emit.
@param {...*} args Optional set of arguments which will be passed onto the event listeners.
@return {Object} Event object (see {@link ng.$rootScope.Scope#$on}).