从阵列中找到领导者(Find the leader from an Array)

 有很多方法可以解决这个问题，这实际上取决于你如何进行导航。 如果您正在使用实际链接或使用router.navigate()更改路由，您的router将调度route:<route name>事件，您可以侦听，将相同的参数传递给处理程序，因为它传递给路由功能。 
 
 结果证明用Backbone设置测试用例代码需要多长时间，我让你成为一个jsFiddle来说明这种方法： http ： //jsfiddle.net/nrabinowitz/ZrgJF/7/ 
 
 很多这只是设置代码; 这个问题的重要部分是路由器： 
 
var MyRouter = Backbone.Router.extend({
    routes: {
        'view/:id' : 'openView'
    },
    openView: function(id) {
        app.openView(id)
    }
});
router = new MyRouter();
 
 并且视图将删除绑定到路由： 
 
var MyView = Backbone.View.extend({
    initialize: function(opts) {
        this.id = opts.id;
        router.bind('route:openView', this.dispose, this); 
    },
    // id is the same as the route argument
    dispose: function(id) {
        if (id != this.id) {
            this.remove();
        }
    }
    // etc
});

There are lots of ways to approach this, and it really depends on how you're doing the navigation. If you're changing routes with actual links, or by using router.navigate(), your router will dispatch a route:<route name> event that you can listen to, passing the same arguments to the handler as it passes to the route function.
 
In what turned out to be a demonstration of just how long it takes to set up test case code with Backbone, I made you a jsFiddle to illustrate this approach: http://jsfiddle.net/nrabinowitz/ZrgJF/7/
 
A lot of this is just setup code; the important parts for this question are the router:
 
var MyRouter = Backbone.Router.extend({
    routes: {
        'view/:id' : 'openView'
    },
    openView: function(id) {
        app.openView(id)
    }
});
router = new MyRouter();
 
And the view, which binds removal to the route:
 
var MyView = Backbone.View.extend({
    initialize: function(opts) {
        this.id = opts.id;
        router.bind('route:openView', this.dispose, this); 
    },
    // id is the same as the route argument
    dispose: function(id) {
        if (id != this.id) {
            this.remove();
        }
    }
    // etc
});