If you are reading this book on an eReader, we want to point out that reading the code may be tricky at times. Longer lines of code will wrap to a second line depending on your selected font size. This bothers us because we are really conscientious at Big Nerd Ranch about the way our code appears on the page. Clear visual patterns in code make that code easier to understand.

The longest lines of code in this book are 86 monospace characters, like this one.

cell = tableView.dequeueReusableCell(withIdentifier: "UITableViewCell", for: idxPath1)

You can play with your e-reader’s settings to find the best for viewing long code lines.

When you get to the point where you are actually typing in code, we suggest opening the book on your Mac in iBooks or Adobe Digital Editions. (Adobe Digital Editions is a free eReader application you can download from http://​www.adobe.com/​products/​digitaleditions/.) Make the application window large enough so that you can see the code with no wrapping lines. You will also be able to see the figures in full detail.