Conventions Used in This Book
The following typographical conventions are used in this book:
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Used for program listings, as well as within paragraphs to refer to program elements such as variable or function names, databases, data types, environment variables, statements, and keywords.
Constant width bold
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Constant width italic
Shows text that should be replaced with user-supplied values or by values determined by context.
Using Code Examples
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We appreciate, but do not require, attribution. An attribution usually includes the title, author, publisher, and ISBN. For example: “Decentralized Applications by Siraj Raval (O’Reilly). Copyright 2016 Siraj Raval, 978-1-4919-2454-9.”
If you feel your use of code examples falls outside fair use or the permission given above, feel free to contact us at firstname.lastname@example.org.
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