What is the best method for handling polling activity feeds or infinite scroll in backbone collection views? I tied this into a backbone marionette collection view with an infinite scroll library. Is there a better way? Am I missing an easier way to handle these cases using a backbone collection?

backbone collection push and unshift

var fetch = Backbone.Collection.prototype.fetch;
var reset = Backbone.Collection.prototype.reset;

Backbone.Collection.prototype.fetch = function (options) {
    if (options.unshift || options.push) { // force a reset
        options.reset = true;
    }

    return fetch.call(this, options);
};

Backbone.Collection.prototype.reset = function (models, options) {
    if (!options.unshift && !options.push) {
        reset.call(this, models, options);
        return this;
    }
    var action = options.push  ? 'push' : 'unshift',
        method = action === 'push' ? 'add' : 'unshift';
        this[method](models, _.extend({ silent: false }, options));
        if (!options.silent) {
            this.trigger(action, models);
        }

    return this;
};

Better yet, just call fetch with ({remove: false, merge: false}). For prepending instead of appending, pass at: 0 with the other options. No monkey-patching necessary :)