Backbone collections
Collections are a convenient way to group models together. An example usage of them is when you want to show a list of elements in your page. You can create a simple collection using Backbone.Collection (I am using the models I defined on Introduction to Backbone.js):
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// Create some people
var juan = new Person({'weight': 80});
var carlos = new Person({'weight': 70});
var alicia = new Person({'weight': 75});
var persons = new Backbone.Collection([
juan,
carlos,
alicia
]);