An improvement on the angular.module() API, making it easier to split up modules into multiple files without having to worry about only registering them once.

gistfile1.js

/**
 * Workaround to make defining and retrieving angular modules easier and more intuitive.
 */

(function(angular) {
  var origMethod = angular.module;

  var alreadyRegistered = {};

  /**
   * Register/fetch a module.
   *
   * @param name {string} module name.
   * @param reqs {array} list of modules this module depends upon.
   * @param configFn {function} config function to run when module loads (only applied for the first call to create this module).
   * @returns {*} the created/existing module.
   */
  angular.module = function(name, reqs, configFn) {
    reqs = reqs || [];
    var module = null;

    if (alreadyRegistered[name]) {
      module = origMethod(name);
      module.requires.push.apply(module.requires, reqs);
    } else {
      module = origMethod(name, reqs, configFn);
      alreadyRegistered[name] = module;
    }

    return module;
  };

})(angular);