Chapter 6
Using Arrays
IN THIS CHAPTER
Creating, accessing, and modifying arrays
Removing array elements
Programming and looping with array methods
Destructuring and spreading arrays
“I am large. I contain multitudes.”
—WALT WHITMAN
Most of the data I describe how to work with earlier in this book is in the form of simple variables and constants that store a single value. However, it's common in programming, and in life, to need to store lists of related items under a single name. Think about the following common lists that many people use daily:
- Mailing lists and contacts
- Grocery lists
- To-do lists
- Lists of favorite songs
- The list of items on an invoice or a receipt
- The list of chapters in a book
In each case, without the ability to collect individual pieces of data into a list, you'd just have sticky notes scattered all over the place and in no particular order (a bit like my desk).
Think for a moment about your favorite apps and websites. Whether it's a blog, a social media site such as Twitter or Instagram, or your daily run log app, a large part of the app is dedicated to ...
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