Merge backbone views (mixin pattern)

backbone-mixin.js

/**
 * ## Merging mixin views in backbone.js ##
 *
 * really just more a test for tumblr gistr 
 */

/**
 * Merge the mixin (a Backbone.View) into another Backbone.View. Automatically merge events, defaults, and call the parent initializer.
 **/
function mergeMixin(view, mixin) {
  _.defaults(view.prototype, mixin);
  _.defaults(view.prototype.events, mixin.events);
  if (mixin.initialize !== undefined) {
    var oldInitialize = view.prototype.initialize;
    view.prototype.initialize = function () { mixin.initialize.apply(this); oldInitialize.apply(this); };
  }
}