backbone.js collection where() function

Question

I'm reading a book on rapid prototyping in JS. There is this line of code:

var appleModel = this.collection.where({name: appleName})[0];

I know where() returns matching models in the collection. But what does the [0] at the end do?

Answer 1

Backbone's .where() function returns an array of models. The [0] at the end simply takes the first model returned by .where() .

Answer 2

Backbone has its own method when it comes to searching for first result. collection.findWhere(attributes)

http://backbonejs.org/#Collection-findWhere

Answer 3

From my python experience this selects the first element of an array. Obviously where() returns a list (array).