Adds pluckMultiple function to Backbone.js collection

pluckMultiple allows you to pass in an array of attribute names as a "schema" and it will return an array of objects derived from the models of the array based on the "schema"

by Spencer Wasden

HTML

<script src="http://underscorejs.org/underscore-min.js"></script>
<script src="http://backbonejs.org/backbone-min.js"></script>

JavaScript

_.extend(Backbone.Collection.prototype, {
     pluckMultiple : function (attrs) {
         var plucked = this.map(function(model) {
             return _.pick(model.toJSON(), attrs);  
         });   
         return plucked;
     }
});

var c = new Backbone.Collection([
    {id:1, name:"raju",   age:23, sex: 'male', title: 'manager'},
    {id:2, name:"ramesh", age:54, sex: 'male', title: 'tech'}
]);

var plucked = c.pluckMultiple(['name','title']);
console.log( c.pluckMultiple(['name','title']) );

var b = $('body');
_.each(plucked, function(p){
    b.append(p.name + '.........' + p.title);
    b.append('<br/>');
});