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Working with Sets

In this Chapter

  • Learn all about the Set data structure

  • Understand how to use sets to avoid duplicate items in the collection

When it comes to storing a collection of data, arrays probably come to mind first. They’ve been around forever, are very flexible, and contain a boatload of properties that make using them a breeze. Over the past few years, JavaScript gained another way to store a collection of data. That way is via this mysterious array-looking creature known as a set. On the surface, arrays and sets look similar:

images

But there are a bunch of characteristics that make them different. The biggest characteristic is ...

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