• Erlang distribution gives one mechanism for linking Erlang systems to each other.
Chapter 15 shows how Erlang supports programming across the Internet using
sockets, and Chapter 16 covers the various ways in which Erlang can interwork
with systems written in C, Java, and Ruby, as well as many other languages.
• The standard Erlang distribution comes with a number of very useful tools, and
we cover some of these next. Chapter 17 explains in depth how all aspects of Erlang
systems can be traced without degrading their performance, and Chapter 18 covers
tools for checking the correctness of programs, and for constructing documenta-
tion for Erlang systems. Unit testing, and how it is supported by EUnit, is the
subject of Chapter 19.
• The last chapter, Chapter 20, looks at how to write programs that are elegant,
readable, and efficient, and pulls together into one place much of the accumulated
experience of the Erlang community.
The Appendix covers how to get started with Erlang, how to use the Erlang shell,
popular tools for Erlang, and how to find out more about Erlang.
Each chapter is accompanied by a set of exercises, and you can download all the code
in this book from its website:
http://www.erlangprogramming.org
The website also has references to further reading as well as links to the major sites
supporting the Erlang community.
We wrote
this book to be compatible with Erlang Release 13 (R13-B). Most of the
features we describe will work with earlier releases; known incompatibilities with more
recent earlier releases are detailed on our website.
Conventions Used in This Book
The following typographical conventions are used in this book:
Italic
Indicates new terms, URLs, filenames, file extensions, and occasionally, emphasis
and keyword phrases.
Constant width
Indicates computer coding in a broad sense. This includes commands, options,
variables, attributes, keys, requests, functions, methods, types, classes, modules,
properties, parameters, values, objects, events, event handlers, XML and XHTML
tags, macros, and keywords.
Constant width bold
Indicates commands or other text that the user should type literally.
xviii | Preface
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