Conventions

To help you get the most from the text and keep track of whats happening, Ive used a number of conventions throughout the book.

Important 

Boxes like this one hold important, not-to-be-forgotten information that is directly relevant to the surrounding text.

Tips, hints, tricks, and asides to the current discussion are offset and placed in italics like this.

   In code examples, I highlight new and important code with a gray background.   

 The gray highlighting is not used for code that's less important in the present context, or has been shown before.