This appendix is by no means meant to be a comprehensive Dart reference. Nor is it an exhaustive review of every language feature covered in the book. Instead, it is meant to be a quick-reference guide to the core language and some of the most commonly used classes in the standard library. If you’ve read the whole book, you will have seen all of this material before. If the material of a particular section is covered wholly in a chapter or two, then those chapters are listed in parentheses after the topic. The purpose of this appendix is to quickly give you an example of how something may appear syntactically. It is not meant to explain “why.” For that, you’ll have to read the book! There is no new material in this appendix. All of the content has been covered in the main text in far greater depth.