Anton Shestakov <av6@dwimlabs.net>, Wed, 22 Jun 2016 14:25:54 +0800
backbone.shard: add new methods (from Underscore), test them
Namely, these methods are added:
- difference
- findIndex
- findLastIndex
- includes
- sample
backbone.shard.js
Permissions: -rw-r--r--
* (c) 2013, 2016 Anton Shestakov. * This extension to Backbone may be freely distributed * https://opensource.org/licenses/MIT Backbone.Shard = function(options) { this._collection = options.collection; this._filter = options.filter; this.models = this._collection.filter(this._filter); .on('all', function(event, model) { if (this._filter(model) && _(this.models).contains(model)) { this.trigger.apply(this, arguments); if (this._filter(model) && !_(this.models).contains(model)) { this.trigger('add', model); if (!this._filter(model) && _(this.models).contains(model)) { this.models = _.without(this.models, model); this.trigger('remove', model); } else if (/^change:/.test(event) && this._filter(model) && _(this.models).contains(model)) { this.trigger.apply(this, arguments); .on('add', function(model) { if (this._filter(model) && !_(this.models).contains(model)) { this.trigger('add', model); .on('remove', function(model) { if (this._filter(model) && _(this.models).contains(model)) { this.models = _.without(this.models, model); this.trigger('remove', model); .on('reset', function() { this.models = this._collection.filter(this._filter); this.initialize.apply(this, arguments); _.extend(Backbone.Shard.prototype, Backbone.Events, { initialize: function() {}, return _.map(this.models, function(model) { return model.get(attr); }); // Underscore methods that we want to implement on the Shard. 'all', 'any', 'chain', 'collect', 'contains', 'detect', 'difference', 'drop', 'each', 'every', 'filter', 'find', 'findIndex', 'findLastIndex', 'first', 'foldl', 'foldr', 'forEach', 'head', 'include', 'includes', 'indexOf', 'initial', 'inject', 'invoke', 'isEmpty', 'last', 'lastIndexOf', 'map', 'max', 'min', 'reduce', 'reduceRight', 'reject', 'rest', 'sample', 'select', 'shuffle', 'size', 'some', 'tail', 'take', 'toArray', 'without' // Mix in each Underscore method as a proxy to `Shard#models`. _.each(methods, function(method) { Backbone.Shard.prototype[method] = function() { var args = Array.prototype.slice.call(arguments); args.unshift(this.models); return _[method].apply(_, args); // Underscore methods that take a property name as an argument. var attributeMethods = ['countBy', 'groupBy', 'indexBy', 'sortBy']; // Use attributes instead of properties. _.each(attributeMethods, function(method) { Backbone.Shard.prototype[method] = function(value, context) { var iterator = _.isFunction(value) ? value : function(model) { return _[method](this.models, iterator, context);