js/libs/ember-1.5.1.js
function doTransition(router, args, isIntermediate) {
      // Normalize blank transitions to root URL transitions.
      var name = args[0] || '/';

      var lastArg = args[args.length-1];
      var queryParams = {};
      if (lastArg && lastArg.hasOwnProperty('queryParams')) {
        queryParams = pop.call(args).queryParams;
      }

      var intent;
      if (args.length === 0) {

        log(router, "Updating query params");

        // A query param update is really just a transition
        // into the route you're already on.
        var handlerInfos = router.state.handlerInfos;
        intent = new NamedTransitionIntent({
          name: handlerInfos[handlerInfos.length - 1].name,
          contexts: [],
          queryParams: queryParams
        });

      } else if (name.charAt(0) === '/') {

        log(router, "Attempting URL transition to " + name);
        intent = new URLTransitionIntent({ url: name });

      } else {

        log(router, "Attempting transition to " + name);
        intent = new NamedTransitionIntent({
          name: args[0],
          contexts: slice.call(args, 1),
          queryParams: queryParams
        });
      }

      return router.transitionByIntent(intent, isIntermediate);
    }
function doTransition(router, args, isIntermediate) {
      // Normalize blank transitions to root URL transitions.
      var name = args[0] || '/';

      var lastArg = args[args.length-1];
      var queryParams = {};
      if (lastArg && lastArg.hasOwnProperty('queryParams')) {
        queryParams = pop.call(args).queryParams;
      }

      var intent;
      if (args.length === 0) {

        log(router, "Updating query params");

        // A query param update is really just a transition
        // into the route you're already on.
        var handlerInfos = router.state.handlerInfos;
        intent = new NamedTransitionIntent({
          name: handlerInfos[handlerInfos.length - 1].name,
          contexts: [],
          queryParams: queryParams
        });

      } else if (name.charAt(0) === '/') {

        log(router, "Attempting URL transition to " + name);
        intent = new URLTransitionIntent({ url: name });

      } else {

        log(router, "Attempting transition to " + name);
        intent = new NamedTransitionIntent({
          name: args[0],
          contexts: slice.call(args, 1),
          queryParams: queryParams
        });
      }

      return router.transitionByIntent(intent, isIntermediate);
    }
@private

Begins and returns a Transition based on the provided
arguments. Accepts arguments in the form of both URL
transitions and named transitions.

@param {Router} router
@param {Array[Object]} args arguments passed to transitionTo,
replaceWith, or handleURL